{"id":7789,"date":"2026-06-03T12:21:01","date_gmt":"2026-06-03T10:21:01","guid":{"rendered":"https:\/\/demke-electronic.com\/faq\/"},"modified":"2026-09-17T10:13:03","modified_gmt":"2026-09-17T08:13:03","slug":"faq","status":"publish","type":"page","link":"https:\/\/demke-electronic.com\/en\/faq\/","title":{"rendered":"FAQ"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7789\" class=\"elementor elementor-7789 elementor-3511\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ce85e2 spot-bg e-flex e-con-boxed e-con e-parent\" data-id=\"5ce85e2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-a135eb4 e-con-full e-flex e-con e-child\" data-id=\"a135eb4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-63f29e4 anim-text elementor-widget elementor-widget-heading\" data-id=\"63f29e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\">Answers about DC\/DC converters<\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65d6124 large elementor-widget elementor-widget-heading\" data-id=\"65d6124\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">FAQ: Frequently Asked Questions About DC\/DC Converters<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156b3d2 xsmall elementor-widget elementor-widget-text-editor\" data-id=\"156b3d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Whether it is input voltage, galvanic isolation, efficiency, CC\/CV or the right design for your application: here we answer common technical questions about DC\/DC converters, how to choose them and how they are used. The information is intended for engineers, designers, technical buyers and anyone who needs a reliable power supply for vehicles, machines and demanding electrical systems. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d2dc4a0 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"d2dc4a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"506\" src=\"https:\/\/demke-electronic.com\/wp-content\/uploads\/header-unternehmen.webp\" class=\"attachment-full size-full wp-image-7735\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-02bfbe3 e-flex e-con-boxed e-con e-parent\" data-id=\"02bfbe3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ad1b8bf elementor-widget elementor-widget-html\" data-id=\"ad1b8bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"rainbow-divider\"><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bd9124f e-flex e-con-boxed e-con e-child\" data-id=\"bd9124f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91aecf1 anim-text elementor-widget elementor-widget-heading\" data-id=\"91aecf1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\">WATT do you want to know?<\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-96d8f76 elementor-widget elementor-widget-heading\" data-id=\"96d8f76\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">We Have Answers!<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37215a5 elementor-widget elementor-widget-text-editor\" data-id=\"37215a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>From the basics to specific applications: here you will find answers to frequently asked questions about the selection, function and use of our DC\/DC converters.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d85c46 xsmall elementor-widget elementor-widget-shortcode\" data-id=\"9d85c46\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t<div class=\"demke-component demke-faq\" id=\"demke-faq-1\" data-demke-component>\n\t\t\t\t\t<label class=\"screen-reader-text\" for=\"demke-faq-1-filter\">\n\t\t\t\tFilter questions\u2026\t\t\t<\/label>\n\t\t\t<input\n\t\t\t\ttype=\"search\"\n\t\t\t\tid=\"demke-faq-1-filter\"\n\t\t\t\tclass=\"demke-filter\"\n\t\t\t\tplaceholder=\"Filter questions\u2026\"\n\t\t\t\taria-controls=\"demke-faq-1-liste\"\n\t\t\t\tautocomplete=\"off\"\n\t\t\t\tspellcheck=\"false\"\n\t\t\t\tmaxlength=\"100\"\n\t\t\t>\n\t\t\n\t\t<div class=\"demke-liste\" id=\"demke-faq-1-liste\">\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"are-demke-converters-suitable-for-charging-batteries-and-supercaps\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Are Demke converters suitable for charging batteries and supercaps?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes, thanks to the CC\/CV charging characteristic our converters work as fully-fledged chargers for batteries and supercapacitors. They charge with constant current up to the end-of-charge voltage and then hold it constant. Conversely, our buck-boost converters make optimal use of the energy stored in batteries and supercaps: even as the storage voltage drops significantly, they keep delivering a stable output voltage.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"are-demke-dc-dc-converters-short-circuit-and-no-load-proof\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Are Demke DC\/DC converters short-circuit and no-load proof?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes, our converters are permanently no-load and short-circuit proof. Under overload or short circuit they limit the output current to a safe value (CC behavior) instead of shutting down or being damaged. A thermal shutdown additionally protects the device: if the case temperature exceeds the shutdown threshold (e.g. +90 \u00b0C), the converter deactivates and restarts automatically once the temperature has dropped.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"are-demke-products-reach-and-rohs-compliant\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Are Demke products REACH and RoHS compliant?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes, our DC\/DC converters are REACH and RoHS compliant. The corresponding declarations are available for download on the &quot;Standards and Certifications&quot; page. If you have questions about individual substances or need customer-specific declarations of conformity, our team is happy to help.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"are-there-one-time-costs-with-a-first-order\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Are there one-time costs with a first order?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">For series products from stock: no. For build-to-order (BTO) and custom converters, initial manufacturing costs as well as development and project costs may apply \u2013 depending on the device and the scope of changes. From an order quantity of 25 pieces these are reduced to a minimum. We always list one-time costs transparently and separately in the quotation, so you have full cost control.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"are-we-on-a-first-name-basis\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Are we on a first-name basis?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Of course \ud83d\ude42 You too?<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"can-demke-dc-dc-converters-drive-capacitive-loads-and-operate-in-parallel\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Can Demke DC\/DC converters drive capacitive loads and operate in parallel?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes. Many of our converters drive practically unlimited capacitive loads (datasheet: &quot;infinite&quot;) and are suitable for active loads and parallel connection of multiple units. An integrated soft start ramps up the output voltage in a controlled way and reduces inrush currents \u2013 upstream fuses will not trip. Models with an internal decoupling diode (suffix &quot;E&quot;) can be connected directly in parallel or in redundant configurations.<\/p>\r\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"can-i-order-just-1-to-5-pieces\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Can I order just 1 to 5 pieces?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes. We supply series products from stock without a minimum order quantity, and we even develop and deliver custom converters from quantity one. Only project-specific build-to-order devices carry a minimum order quantity (MOQ), because small batches cause increased production costs \u2013 from 25 pieces, initial costs are reduced to a minimum. We gladly accept prototypes and sample orders on request.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"can-your-converters-be-certified-for-railway-applications\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Can your converters be certified for railway applications?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes, we implement railway certifications flexibly on customer request \u2013 including EN 50155 (railway applications), EN 45545 (railway fire protection), EN 61373 (shock and vibration) and EN 50121-3-2 (railway EMC). Our fully potted, vibration-proof converters with wide-range input are structurally suited for rail-based transport systems, cableways and mountain railways.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"do-you-also-offer-complete-development-services\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Do you also offer complete development services?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes, we develop power electronics beyond DC\/DC converters \u2013 from circuit design through prototyping to series production. On request we deliver as white label without Demke branding, so you can market the solution under your own brand. Our services also include power electronics forensics: analyzing failures and weaknesses of existing electronics.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"do-you-also-supply-prototypes-and-small-production-runs\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Do you also supply prototypes and small production runs?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes. We supply custom converters starting from a single unit and are happy to accept prototypes and project-specific orders on request. For build-to-order products, initial costs are reduced to a minimum from 25 units. For series production, we scale manufacturing through our ISO 9001-certified production partner in Germany.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"does-demke-electronic-develop-custom-dc-dc-converters\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Does Demke Electronic develop custom DC\/DC converters?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes, custom DC\/DC converters are one of our core competencies \u2013 starting from quantity one. We realize unipolar output voltages from 12 V to 200 V (e.g. 13.8 V, 24 V, 27.5 V, 28 V, 29 V, 48 V, 57 V) as well as isolated converters with bipolar outputs such as \u00b115 V, \u00b124 V or \u00b128 V. We also implement special requests for connectors, cables, housings and mounting. Send us your specifications via the inquiry form.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"does-demke-offer-framework-agreements-and-call-off-orders\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Does Demke offer framework agreements and call-off orders?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Yes. For regularly required DC\/DC converters, we offer individual framework agreements with agreed quantities, prices, contract terms and call-off orders.<\/p>\n<p class=\"wp-block-paragraph\">For recurring orders, we strongly recommend entering into a framework agreement. Especially for electronic components, supply shortages can lead to longer procurement and production times. By planning requirements in advance, we can schedule materials and production capacities proactively and significantly increase supply security.<\/p>\n<p class=\"wp-block-paragraph\">The terms depend on the product, annual demand, call-off quantity and desired delivery time.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-are-the-dc-dc-converters-tested\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How are the DC\/DC converters tested?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Each DC\/DC converter is fully automatically tested multiple times during manufacturing. This allows electrical deviations to be detected at an early stage, before the device is fully potted and shipped to the customer.<\/p>\n<p class=\"wp-block-paragraph\">specially with fully PU-potted assemblies, complete testing is essential because later repairs are only possible to a limited extent. Devices outside the defined tolerances are therefore removed during the production process. This helps us maintain consistent quality while reducing scrap, material use and unnecessary transport.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-can-i-find-a-demke-sales-partner-in-my-region\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How can I find a Demke sales partner in my region?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">We supply our customers worldwide directly. International deliveries are generally shipped from our production site in Germany. Customers in Switzerland are supplied directly from our Swiss warehouse.<\/p>\n<p class=\"wp-block-paragraph\">In selected regions, we also work with carefully chosen sales partners. However, contacting Demke directly remains the easiest way to make enquiries, select products and place orders.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-can-i-order-from-demke-electronic\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How can I order from Demke Electronic?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Fastest directly from us: via the inquiry form on the product page, by e-mail to info@demke-electronic.com or by phone at +41 71 511 34 00 (Mon\u2013Thu 8:30\u201316:00, Fri 8:30\u201312:00 CET). Tell us the item number or your requirements, quantity and target date \u2013 you will receive a quotation promptly. We ship worldwide to professional equipment manufacturers and industrial customers.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-do-i-choose-the-right-dc-dc-converter-for-my-application\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How do I choose the right DC\/DC converter for my application?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Four key questions lead to the right converter: (1) Input voltage range \u2013 which source, how much does it fluctuate? (2) Output voltage and maximum output current or power? (3) Isolation required or not? (4) Environment \u2013 temperature, humidity, vibration, protection class? With these parameters you can find the right device via our product filters, or use the configuration form and we will propose the optimal solution.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-do-i-reach-technical-support\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How do I reach technical support?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Directly and without a ticket system: by phone at +41 71 511 34 00 (Mon\u2013Thu 8:30\u201316:00, Fri 8:30\u201312:00 CET) or by e-mail to info@demke-electronic.com. At Demke you talk directly to the engineers who developed your power supply \u2013 from product selection and EMC questions to field failure analysis. For project discussions you can also book an appointment directly.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-do-i-retrofit-laptops-or-vehicle-terminals-on-an-electric-forklift\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How do I retrofit laptops or vehicle terminals on an electric forklift?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">With a rugged 19 V DC\/DC converter connected directly to the forklift battery. Ordinary laptop power supplies fail due to fluctuating battery voltages and vibration. Our 19 V converter (e.g. DC-Converter 145-19-SD) covers 24 V, 36 V, 48 V and 80 V forklift batteries and powers mobile IT equipment reliably \u2013 even during voltage dips when lifting or accelerating.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-do-the-sd-on-and-sh-control-inputs-work\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How do the SD, ON and SH control inputs work?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p>Depending on the DC\/DC converter, different control inputs are available for externally switching the converter on or off or for selecting a different output voltage.<\/p>\r\n<p>SD \u2013 Shutdown: The converter is enabled when the SD pin is open or High. Pulling the SD pin Low or connecting it to the negative input potential switches the converter off.<\/p>\r\n<p>ON \u2013 Enable: The converter is disabled when the ON pin is open or Low. To switch it on, the ON pin must be pulled High or connected to the positive input potential.<\/p>\r\n<p>SH \u2013 Switch High: On appropriately equipped products, the SH pin is used to select a product-specific output voltage setting. Its exact function depends on the individual converter.<\/p>\r\n<p>Switch High example:<\/p>\r\n<p>On the 757-27-SDB4, the output voltage is 29 V when the SH pin is Low. When the SH pin is open or High, the output voltage is 27 V.\u00a0<\/p>\r\n\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<th>Signal<\/th>\r\n<th>Low<\/th>\r\n<th>Open<\/th>\r\n<th>High<\/th>\r\n<\/tr>\r\n<tr>\r\n<td>SD<\/td>\r\n<td>Off<\/td>\r\n<td>On<\/td>\r\n<td>On<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>ON<\/td>\r\n<td>Off<\/td>\r\n<td>Off<\/td>\r\n<td>On<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"4\">\u00a0<\/td>\r\n<\/tr>\r\n<tr>\r\n<th>Signal<\/th>\r\n<th>Low<\/th>\r\n<th>Open<\/th>\r\n<th>High<\/th>\r\n<\/tr>\r\n<tr>\r\n<td>SH (757-27-SDB4)<\/td>\r\n<td>29\u00a0V<\/td>\r\n<td>27\u00a0V<\/td>\r\n<td>27\u00a0V<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n<p>&nbsp;<\/p><\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-does-a-return-work\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How does a return (RMA) work?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">In three steps: (1) Contact us in writing before shipping and request an RMA number \u2013 returns without prior approval may be sent back unexamined. (2) Include a precise fault description. (3) Pack the device securely for transport and ship it with sufficient postage. After inspection we will inform you about repair, replacement or credit. Please report visible defects within 7 days of receiving the goods.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-efficient-are-demke-dc-dc-converters\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How efficient are Demke DC\/DC converters?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Depending on model and operating point, our DC\/DC converters achieve efficiencies of up to 99%. Efficiency is the ratio of output power to input power, measured directly at the converter terminals. In practice, high efficiency means less waste heat, smaller enclosures, longer battery runtime in mobile systems and longer electronics lifetime. Values at full load, 50% load and 10% load are listed in every datasheet.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"how-fast-can-you-deliver\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">How fast can you deliver?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Series products from stock (labeled MTS \u2013 Make to Stock in the product filter) are available at short notice, usually within 6 weeks. Build-to-order devices (BTO) and custom converters are planned with you on a project basis; we state the binding delivery date in the quotation. For ongoing series demand, framework agreements with call-off quantities secure your supply.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"my-converter-is-being-discontinued\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">My converter is being discontinued (EOL) \u2013 what now?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Don&#039;t worry: for most discontinued devices (EOL \u2013 End of Life), improved successors with equal or better specifications are already available. We advise you on suitable replacement types, support the requalification of your application and, on request, arrange a last-time buy for your remaining demand. Just contact us with the item number of your device.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"to-which-quality-standards-are-the-dc-dc-converters-manufactured\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">To which quality standards are the DC\/DC converters manufactured?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Our DC\/DC converters are manufactured by our ISO 9001:2015-certified production partner. This ensures defined and documented quality processes throughout manufacturing.<\/p>\n<p class=\"wp-block-paragraph\">Technical design, custom adaptation and project coordination are carried out in close collaboration with us. Depending on the product, the devices are tested, potted and documented in accordance with the agreed technical requirements.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-do-mtbf-and-mttf-mean\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What do MTBF and MTTF mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">MTBF (Mean Time Between Failures) is the statistical average operating time between two failures; MTTF (Mean Time To Failure) is the average time until a device fails. Demke converters achieve MTBF values of up to 1.5 million hours \u2013 made possible by an uncompromisingly high-quality bill of materials. In addition, every single device is 100% tested before delivery; more than 99.5% operational reliability has been proven in the field.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-no-power-derating-mean\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does &quot;no power derating&quot; mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">No derating means the converter delivers its full rated power across the entire specified temperature range from \u221240 \u00b0C to +85 \u00b0C \u2013 with no power reduction in heat or cold. Many standard converters must be throttled above roughly 50\u201360 \u00b0C ambient, forcing you to oversize them. Demke converters deliver up to 1200 W even under extreme conditions, so oversizing is unnecessary.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-bto\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does BTO \u2013 Build to Order mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">BTO (Build to Order) means that the device is fully developed and manufactured after the order is placed. Initial production costs may apply, which are reduced to a minimum from a minimum order quantity of 25 units. Prototypes and project-specific orders are also available on request. BTO devices may still undergo changes resulting from internal validation until final approval.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-eol\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does EOL \u2013 End of Life mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">EOL (End of Life) identifies products that are no longer in series production or are no longer recommended for new projects. Many EOL devices already have improved successors with the same or better specifications. If you are using an EOL product, we will be happy to advise you on suitable replacements and support you with requalification.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-galvanic-isolation-mean-in-dc-dc-converters\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does galvanic isolation mean in DC\/DC converters?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Galvanic isolation means the input and output circuits are completely electrically separated \u2013 energy is transferred via a transformer. This protects sensitive electronics from interference, prevents ground loops and increases safety. Our isolated converters achieve insulation strengths of e.g. 2100 VDC between primary and secondary side. Non-isolated converters share a common reference potential but are more compact and cost-effective.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-moq\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does MOQ \u2013 Minimum Order Quantity mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">MOQ is the minimum order quantity for project-specific, custom DC\/DC converters. Since custom devices are manufactured exclusively for specific projects and are not kept in general stock, they have a minimum order quantity due to the higher production costs for small quantities; one-time costs may also apply. Talk to us \u2013 we can always find a solution for prototypes and pre-series production.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-mts\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does MTS \u2013 Make to Stock mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">MTS (Make to Stock) identifies our stock-managed standard products. These devices are manufactured regularly in series and are available at short notice, depending on current stock levels, or generally within 6 weeks. MTS products can be identified by the corresponding label in the product filter. For ongoing series requirements, we are happy to arrange framework agreements with call-off quantities.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-does-protection-class-ip69k-mean\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What does protection class IP69K mean?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">IP69K is the highest protection rating of ISO 20653 and stands for dust-tightness plus resistance to high-pressure and steam-jet cleaning with hot water. Demke converters achieve this through an aluminum housing with full polyurethane potting and sealed cable entries. This makes them resistant to water, dirt, vibration and pressure \u2013 ideal for mobile machinery, construction equipment, agricultural technology, railway applications and food-industry areas with steam cleaning.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-happens-if-my-input-voltage-fluctuates-heavily-or-dips\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What happens if my input voltage fluctuates heavily or dips?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">That is exactly what our converters are built for: the ultra-wide-range input tolerates static deviations of \u00b130% and more from nominal voltage. Buck-boost models keep the output stable even when the input drops below the output voltage \u2013 during cranking, lifting or with an aging battery. An undervoltage lockout protects the battery from deep discharge by shutting the converter down below a defined threshold.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-is-a-cc-cv-charging-characteristic\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What is a CC\/CV charging characteristic?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">CC\/CV stands for Constant Current \/ Constant Voltage. In normal operation the converter regulates the voltage (CV); under overload it limits the current to a defined value instead (CC). This characteristic turns our DC\/DC converters into fully-fledged battery chargers: a depleted battery is first charged with constant current until the end-of-charge voltage is reached \u2013 without the converter shutting down or blowing a fuse.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-is-a-dc-dc-converter\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What is a DC\/DC converter?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">A DC\/DC converter is an electronic device that converts one direct (DC) voltage into another, higher or lower DC voltage \u2013 for example, 80 V from a forklift battery into a stable 24 V for the on-board network. A complete Demke Electronic DC\/DC converter includes not only the power stage but also the control loop, power switches and EMI filters, so the output voltage is delivered stable, low-noise and compliant with EMC standards.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-is-a-wide-range-or-ultra-wide-range-input\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What is a wide-range or ultra-wide-range input?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">A wide-range input allows a DC\/DC converter to operate stably over a very large input voltage range \u2013 at Demke up to a ratio of 1:10, e.g. from 12 V (lead-acid) to 120 V (lithium). A single converter thus covers 24 V, 48 V and 80 V vehicle platforms, dramatically reducing variant diversity, stock and effort in engineering and purchasing. Example: the DC-Converter 755-24-SD operates from 18 to 110 VDC.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"what-is-the-difference-between-a-buck-a-boost-and-a-buck-boost-converter\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">What is the difference between a buck, a boost and a buck-boost converter?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">A buck (step-down) converter produces a lower output voltage, a boost (step-up) converter a higher one than the input. A buck-boost converter does both: it delivers a stable output voltage regardless of whether the input voltage is above or below it. This is essential in battery applications, because battery voltage varies widely with the state of charge \u2013 for example a 24 V output from a 24 V battery that swings between 18 V and 30 V.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"when-do-i-need-an-isolated-converter-and-when-is-a-non-isolated-one-sufficient\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">When do I need an isolated converter, and when is a non-isolated one sufficient?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">You need an isolated converter when input and output circuits must have separate potentials \u2013 for example to protect sensitive sensors, avoid ground loops, meet safety requirements, or comply with standards (e.g. railway). A non-isolated converter is sufficient when both circuits may share the same ground potential, such as powering controllers and terminals from the same vehicle network. If in doubt, we are happy to advise you.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"where-are-demke-dc-dc-converters-developed-and-manufactured\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Where are Demke DC\/DC converters developed and manufactured?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Development takes place in Switzerland: Demke Electronic GmbH is based in Wil SG and has specialized in DC\/DC converters since 2008. Manufacturing is carried out to ISO 9001:2015 by our long-standing production partner Elotec Fischer GmbH in Germany \u2013 Designed in Switzerland, Made in Germany. Every single device is 100% tested before delivery.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"where-can-i-find-product-datasheets\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Where can I find product datasheets?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Every product page offers the complete technical datasheet as a PDF download. It contains all electrical specifications (input, output, control), thermal characteristics, EMC compliance, mechanical dimensions and the pin assignment. If you are missing a parameter or need 3D data, derating curves or application notes, contact us directly.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"which-countries-does-demke-electronic-gmbh-deliver-to\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Which countries does Demke Electronic GmbH deliver to?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">We deliver within Switzerland, Germany, the European Union and, in principle, worldwide. Swiss customers are supplied directly from our warehouse in Switzerland; international deliveries are generally shipped from our production site in Germany.<\/p>\n<p class=\"wp-block-paragraph\">We comply with all applicable export control, embargo and sanctions regulations. Depending on the destination country, product, recipient and intended use, additional checks or approvals may be required.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"which-dc-dc-converter-fits-forklifts-and-industrial-trucks\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Which DC\/DC converter fits forklifts and industrial trucks?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">For forklifts and industrial trucks we recommend our rugged converters with ultra-wide-range input, covering all common battery voltages \u2013 24 V, 36 V, 48 V and 80 V \u2013 with a single device. They stabilize 12 V and 24 V on-board networks for terminals, sensors and communication, are fully potted, vibration-proof and deliver full power from \u221240 \u00b0C to +85 \u00b0C. One converter variant serves your entire vehicle fleet.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"which-incoterms-does-demke-electronic-offer\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Which Incoterms does Demke Electronic offer?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">In principle, we supply according to the following Incoterms:<\/p>\n<ul class=\"wp-block-list\"><li>Within Switzerland and Germany: EXW, DAP<\/li><li>Within the EU: DAP<\/li><li>Third countries: DAP, FCA<\/li><\/ul>\n<p class=\"wp-block-paragraph\">We are happy to review alternative Incoterms individually, depending on the destination country and the requirements of the respective project.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"which-standards-and-certifications-do-demke-dc-dc-converters-meet\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Which standards and certifications do Demke DC\/DC converters meet?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">Our latest developments meet the EMC standards EN 61000-6-2 (industrial immunity), EN 61000-4-2 through 4-6 (ESD, RF fields, burst, surge, conducted disturbances) as well as EN 61000-6-3\/6-4 (emission for residential and industrial environments). The DC-Converter 729-57-ON holds the automotive road approval E13-10R-05. On customer request we flexibly certify additional standards, e.g. UL or ECE.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t\t\t<details class=\"demke-item\" id=\"why-do-you-convert-power-like-the-octopus-changes-its-shape\">\n\t<summary>\n\t\t<h2 class=\"demke-item-title\">Why do you &quot;convert power like the octopus changes its shape&quot;?<\/h2>\n\t<\/summary>\n\t<div class=\"demke-inhalt\"><p class=\"wp-block-paragraph\">The octopus is our guiding principle: it adapts to any environment in an instant \u2013 just like our DC\/DC converters, which adapt to the most diverse voltage platforms thanks to their wide-range input. Its three hearts stand for our values: acting responsibly towards stakeholders and the environment, investing in sustainable research and development, and responding flexibly to customer needs. Strong and flexible like an octopus \u2013 power converters with heart.<\/p>\n<\/div>\n<\/details>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<p class=\"demke-keine-treffer\" hidden aria-live=\"polite\">No matching entries found.<\/p>\n\t\t\t<\/div>\n\n\t<script>\n\t(function(script){\n\t\t'use strict';\n\t\tvar root = script.previousElementSibling;\n\t\tif (!root || !root.matches('[data-demke-component]')) return;\n\n\t\tvar input = root.querySelector('.demke-filter');\n\t\tvar items = Array.prototype.slice.call(root.querySelectorAll('.demke-item'));\n\t\tvar empty = root.querySelector('.demke-keine-treffer');\n\n\t\tfunction norm(value){\n\t\t\treturn String(value || '')\n\t\t\t\t.toLocaleLowerCase()\n\t\t\t\t.normalize('NFD')\n\t\t\t\t.replace(\/[\\u0300-\\u036f]\/g, '')\n\t\t\t\t.trim();\n\t\t}\n\n\t\tif (input) {\n\t\t\tvar haystacks = items.map(function(item){ return norm(item.textContent); });\n\n\t\t\tinput.addEventListener('input', function(){\n\t\t\t\t\/\/ Der Suchwert wird ausschlie\u00dflich als String verglichen.\n\t\t\t\t\/\/ Kein innerHTML, kein eval, kein RegExp aus Benutzereingaben, kein Netzwerkrequest.\n\t\t\t\tvar q = norm(input.value).slice(0, 100);\n\t\t\t\tvar visible = 0;\n\n\t\t\t\titems.forEach(function(item, index){\n\t\t\t\t\tvar hit = (q === '') || haystacks[index].indexOf(q) !== -1;\n\t\t\t\t\titem.hidden = !hit;\n\t\t\t\t\tif (hit) visible++;\n\t\t\t\t\tif (q !== '') item.open = hit;\n\t\t\t\t});\n\n\t\t\t\tif (empty) empty.hidden = visible !== 0;\n\t\t\t});\n\t\t}\n\n\t\tfunction openHash(){\n\t\t\tif (!window.location.hash) return;\n\t\t\tvar raw = window.location.hash.slice(1);\n\t\t\tvar id;\n\t\t\ttry { id = decodeURIComponent(raw); } catch(e) { return; }\n\n\t\t\tvar el = document.getElementById(id);\n\t\t\tif (!el || !root.contains(el) || el.tagName !== 'DETAILS') return;\n\t\t\tel.hidden = false;\n\t\t\tel.open = true;\n\t\t\twindow.requestAnimationFrame(function(){\n\t\t\t\tel.scrollIntoView({behavior:'smooth', block:'start'});\n\t\t\t});\n\t\t}\n\n\t\twindow.addEventListener('hashchange', openHash, {passive:true});\n\t\topenHash();\n\t})(document.currentScript);\n\t<\/script>\n\t<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"@id\":\"https:\/\/demke-electronic.com\/en\/faq\/#faq\",\"inLanguage\":\"en\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are Demke converters suitable for charging batteries and supercaps?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, thanks to the CC\/CV charging characteristic our converters work as fully-fledged chargers for batteries and supercapacitors. They charge with constant current up to the end-of-charge voltage and then hold it constant. Conversely, our buck-boost converters make optimal use of the energy stored in batteries and supercaps: even as the storage voltage drops significantly, they keep delivering a stable output voltage.\"}},{\"@type\":\"Question\",\"name\":\"Are Demke DC\/DC converters short-circuit and no-load proof?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, our converters are permanently no-load and short-circuit proof. Under overload or short circuit they limit the output current to a safe value (CC behavior) instead of shutting down or being damaged. A thermal shutdown additionally protects the device: if the case temperature exceeds the shutdown threshold (e.g. +90 \u00b0C), the converter deactivates and restarts automatically once the temperature has dropped.\"}},{\"@type\":\"Question\",\"name\":\"Are Demke products REACH and RoHS compliant?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, our DC\/DC converters are REACH and RoHS compliant. The corresponding declarations are available for download on the \\u0026quot;Standards and Certifications\\u0026quot; page. If you have questions about individual substances or need customer-specific declarations of conformity, our team is happy to help.\"}},{\"@type\":\"Question\",\"name\":\"Are there one-time costs with a first order?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For series products from stock: no. For build-to-order (BTO) and custom converters, initial manufacturing costs as well as development and project costs may apply \u2013 depending on the device and the scope of changes. From an order quantity of 25 pieces these are reduced to a minimum. We always list one-time costs transparently and separately in the quotation, so you have full cost control.\"}},{\"@type\":\"Question\",\"name\":\"Are we on a first-name basis?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Of course \ud83d\ude42 You too?\"}},{\"@type\":\"Question\",\"name\":\"Can Demke DC\/DC converters drive capacitive loads and operate in parallel?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Many of our converters drive practically unlimited capacitive loads (datasheet: \\u0026quot;infinite\\u0026quot;) and are suitable for active loads and parallel connection of multiple units. An integrated soft start ramps up the output voltage in a controlled way and reduces inrush currents \u2013 upstream fuses will not trip. Models with an internal decoupling diode (suffix \\u0026quot;E\\u0026quot;) can be connected directly in parallel or in redundant configurations.\"}},{\"@type\":\"Question\",\"name\":\"Can I order just 1 to 5 pieces?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. We supply series products from stock without a minimum order quantity, and we even develop and deliver custom converters from quantity one. Only project-specific build-to-order devices carry a minimum order quantity (MOQ), because small batches cause increased production costs \u2013 from 25 pieces, initial costs are reduced to a minimum. We gladly accept prototypes and sample orders on request.\"}},{\"@type\":\"Question\",\"name\":\"Can your converters be certified for railway applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, we implement railway certifications flexibly on customer request \u2013 including EN 50155 (railway applications), EN 45545 (railway fire protection), EN 61373 (shock and vibration) and EN 50121-3-2 (railway EMC). Our fully potted, vibration-proof converters with wide-range input are structurally suited for rail-based transport systems, cableways and mountain railways.\"}},{\"@type\":\"Question\",\"name\":\"Do you also offer complete development services?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, we develop power electronics beyond DC\/DC converters \u2013 from circuit design through prototyping to series production. On request we deliver as white label without Demke branding, so you can market the solution under your own brand. Our services also include power electronics forensics: analyzing failures and weaknesses of existing electronics.\"}},{\"@type\":\"Question\",\"name\":\"Do you also supply prototypes and small production runs?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. We supply custom converters starting from a single unit and are happy to accept prototypes and project-specific orders on request. For build-to-order products, initial costs are reduced to a minimum from 25 units. For series production, we scale manufacturing through our ISO 9001-certified production partner in Germany.\"}},{\"@type\":\"Question\",\"name\":\"Does Demke Electronic develop custom DC\/DC converters?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, custom DC\/DC converters are one of our core competencies \u2013 starting from quantity one. We realize unipolar output voltages from 12 V to 200 V (e.g. 13.8 V, 24 V, 27.5 V, 28 V, 29 V, 48 V, 57 V) as well as isolated converters with bipolar outputs such as \u00b115 V, \u00b124 V or \u00b128 V. We also implement special requests for connectors, cables, housings and mounting. Send us your specifications via the inquiry form.\"}},{\"@type\":\"Question\",\"name\":\"Does Demke offer framework agreements and call-off orders?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. For regularly required DC\/DC converters, we offer individual framework agreements with agreed quantities, prices, contract terms and call-off orders. For recurring orders, we strongly recommend entering into a framework agreement. Especially for electronic components, supply shortages can lead to longer procurement and production times. By planning requirements in advance, we can schedule materials and production capacities proactively and significantly increase supply security. The terms depend on the product, annual demand, call-off quantity and desired delivery time.\"}},{\"@type\":\"Question\",\"name\":\"How are the DC\/DC converters tested?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Each DC\/DC converter is fully automatically tested multiple times during manufacturing. This allows electrical deviations to be detected at an early stage, before the device is fully potted and shipped to the customer. specially with fully PU-potted assemblies, complete testing is essential because later repairs are only possible to a limited extent. Devices outside the defined tolerances are therefore removed during the production process. This helps us maintain consistent quality while reducing scrap, material use and unnecessary transport.\"}},{\"@type\":\"Question\",\"name\":\"How can I find a Demke sales partner in my region?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"We supply our customers worldwide directly. International deliveries are generally shipped from our production site in Germany. Customers in Switzerland are supplied directly from our Swiss warehouse. In selected regions, we also work with carefully chosen sales partners. However, contacting Demke directly remains the easiest way to make enquiries, select products and place orders.\"}},{\"@type\":\"Question\",\"name\":\"How can I order from Demke Electronic?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fastest directly from us: via the inquiry form on the product page, by e-mail to info@demke-electronic.com or by phone at +41 71 511 34 00 (Mon\u2013Thu 8:30\u201316:00, Fri 8:30\u201312:00 CET). Tell us the item number or your requirements, quantity and target date \u2013 you will receive a quotation promptly. We ship worldwide to professional equipment manufacturers and industrial customers.\"}},{\"@type\":\"Question\",\"name\":\"How do I choose the right DC\/DC converter for my application?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Four key questions lead to the right converter: (1) Input voltage range \u2013 which source, how much does it fluctuate? (2) Output voltage and maximum output current or power? (3) Isolation required or not? (4) Environment \u2013 temperature, humidity, vibration, protection class? With these parameters you can find the right device via our product filters, or use the configuration form and we will propose the optimal solution.\"}},{\"@type\":\"Question\",\"name\":\"How do I reach technical support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Directly and without a ticket system: by phone at +41 71 511 34 00 (Mon\u2013Thu 8:30\u201316:00, Fri 8:30\u201312:00 CET) or by e-mail to info@demke-electronic.com. At Demke you talk directly to the engineers who developed your power supply \u2013 from product selection and EMC questions to field failure analysis. For project discussions you can also book an appointment directly.\"}},{\"@type\":\"Question\",\"name\":\"How do I retrofit laptops or vehicle terminals on an electric forklift?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With a rugged 19 V DC\/DC converter connected directly to the forklift battery. Ordinary laptop power supplies fail due to fluctuating battery voltages and vibration. Our 19 V converter (e.g. DC-Converter 145-19-SD) covers 24 V, 36 V, 48 V and 80 V forklift batteries and powers mobile IT equipment reliably \u2013 even during voltage dips when lifting or accelerating.\"}},{\"@type\":\"Question\",\"name\":\"How do the SD, ON and SH control inputs work?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Depending on the DC\/DC converter, different control inputs are available for externally switching the converter on or off or for selecting a different output voltage. SD \u2013 Shutdown: The converter is enabled when the SD pin is open or High. Pulling the SD pin Low or connecting it to the negative input potential switches the converter off. ON \u2013 Enable: The converter is disabled when the ON pin is open or Low. To switch it on, the ON pin must be pulled High or connected to the positive input potential. SH \u2013 Switch High: On appropriately equipped products, the SH pin is used to select a product-specific output voltage setting. Its exact function depends on the individual converter. Switch High example: On the 757-27-SDB4, the output voltage is 29 V when the SH pin is Low. When the SH pin is open or High, the output voltage is 27 V.\u00a0 Signal Low Open High SD Off On On ON Off Off On \u00a0 Signal Low Open High SH (757-27-SDB4) 29\u00a0V 27\u00a0V 27\u00a0V \\u0026nbsp;\"}},{\"@type\":\"Question\",\"name\":\"How does a return (RMA) work?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In three steps: (1) Contact us in writing before shipping and request an RMA number \u2013 returns without prior approval may be sent back unexamined. (2) Include a precise fault description. (3) Pack the device securely for transport and ship it with sufficient postage. After inspection we will inform you about repair, replacement or credit. Please report visible defects within 7 days of receiving the goods.\"}},{\"@type\":\"Question\",\"name\":\"How efficient are Demke DC\/DC converters?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Depending on model and operating point, our DC\/DC converters achieve efficiencies of up to 99%. Efficiency is the ratio of output power to input power, measured directly at the converter terminals. In practice, high efficiency means less waste heat, smaller enclosures, longer battery runtime in mobile systems and longer electronics lifetime. Values at full load, 50% load and 10% load are listed in every datasheet.\"}},{\"@type\":\"Question\",\"name\":\"How fast can you deliver?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Series products from stock (labeled MTS \u2013 Make to Stock in the product filter) are available at short notice, usually within 6 weeks. Build-to-order devices (BTO) and custom converters are planned with you on a project basis; we state the binding delivery date in the quotation. For ongoing series demand, framework agreements with call-off quantities secure your supply.\"}},{\"@type\":\"Question\",\"name\":\"My converter is being discontinued (EOL) \u2013 what now?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Don\\u0026#039;t worry: for most discontinued devices (EOL \u2013 End of Life), improved successors with equal or better specifications are already available. We advise you on suitable replacement types, support the requalification of your application and, on request, arrange a last-time buy for your remaining demand. Just contact us with the item number of your device.\"}},{\"@type\":\"Question\",\"name\":\"To which quality standards are the DC\/DC converters manufactured?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Our DC\/DC converters are manufactured by our ISO 9001:2015-certified production partner. This ensures defined and documented quality processes throughout manufacturing. Technical design, custom adaptation and project coordination are carried out in close collaboration with us. Depending on the product, the devices are tested, potted and documented in accordance with the agreed technical requirements.\"}},{\"@type\":\"Question\",\"name\":\"What do MTBF and MTTF mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"MTBF (Mean Time Between Failures) is the statistical average operating time between two failures; MTTF (Mean Time To Failure) is the average time until a device fails. Demke converters achieve MTBF values of up to 1.5 million hours \u2013 made possible by an uncompromisingly high-quality bill of materials. In addition, every single device is 100% tested before delivery; more than 99.5% operational reliability has been proven in the field.\"}},{\"@type\":\"Question\",\"name\":\"What does \\u0022no power derating\\u0022 mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No derating means the converter delivers its full rated power across the entire specified temperature range from \u221240 \u00b0C to +85 \u00b0C \u2013 with no power reduction in heat or cold. Many standard converters must be throttled above roughly 50\u201360 \u00b0C ambient, forcing you to oversize them. Demke converters deliver up to 1200 W even under extreme conditions, so oversizing is unnecessary.\"}},{\"@type\":\"Question\",\"name\":\"What does BTO \u2013 Build to Order mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"BTO (Build to Order) means that the device is fully developed and manufactured after the order is placed. Initial production costs may apply, which are reduced to a minimum from a minimum order quantity of 25 units. Prototypes and project-specific orders are also available on request. BTO devices may still undergo changes resulting from internal validation until final approval.\"}},{\"@type\":\"Question\",\"name\":\"What does EOL \u2013 End of Life mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"EOL (End of Life) identifies products that are no longer in series production or are no longer recommended for new projects. Many EOL devices already have improved successors with the same or better specifications. If you are using an EOL product, we will be happy to advise you on suitable replacements and support you with requalification.\"}},{\"@type\":\"Question\",\"name\":\"What does galvanic isolation mean in DC\/DC converters?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Galvanic isolation means the input and output circuits are completely electrically separated \u2013 energy is transferred via a transformer. This protects sensitive electronics from interference, prevents ground loops and increases safety. Our isolated converters achieve insulation strengths of e.g. 2100 VDC between primary and secondary side. Non-isolated converters share a common reference potential but are more compact and cost-effective.\"}},{\"@type\":\"Question\",\"name\":\"What does MOQ \u2013 Minimum Order Quantity mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"MOQ is the minimum order quantity for project-specific, custom DC\/DC converters. Since custom devices are manufactured exclusively for specific projects and are not kept in general stock, they have a minimum order quantity due to the higher production costs for small quantities; one-time costs may also apply. Talk to us \u2013 we can always find a solution for prototypes and pre-series production.\"}},{\"@type\":\"Question\",\"name\":\"What does MTS \u2013 Make to Stock mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"MTS (Make to Stock) identifies our stock-managed standard products. These devices are manufactured regularly in series and are available at short notice, depending on current stock levels, or generally within 6 weeks. MTS products can be identified by the corresponding label in the product filter. For ongoing series requirements, we are happy to arrange framework agreements with call-off quantities.\"}},{\"@type\":\"Question\",\"name\":\"What does protection class IP69K mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"IP69K is the highest protection rating of ISO 20653 and stands for dust-tightness plus resistance to high-pressure and steam-jet cleaning with hot water. Demke converters achieve this through an aluminum housing with full polyurethane potting and sealed cable entries. This makes them resistant to water, dirt, vibration and pressure \u2013 ideal for mobile machinery, construction equipment, agricultural technology, railway applications and food-industry areas with steam cleaning.\"}},{\"@type\":\"Question\",\"name\":\"What happens if my input voltage fluctuates heavily or dips?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"That is exactly what our converters are built for: the ultra-wide-range input tolerates static deviations of \u00b130% and more from nominal voltage. Buck-boost models keep the output stable even when the input drops below the output voltage \u2013 during cranking, lifting or with an aging battery. An undervoltage lockout protects the battery from deep discharge by shutting the converter down below a defined threshold.\"}},{\"@type\":\"Question\",\"name\":\"What is a CC\/CV charging characteristic?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CC\/CV stands for Constant Current \/ Constant Voltage. In normal operation the converter regulates the voltage (CV); under overload it limits the current to a defined value instead (CC). This characteristic turns our DC\/DC converters into fully-fledged battery chargers: a depleted battery is first charged with constant current until the end-of-charge voltage is reached \u2013 without the converter shutting down or blowing a fuse.\"}},{\"@type\":\"Question\",\"name\":\"What is a DC\/DC converter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A DC\/DC converter is an electronic device that converts one direct (DC) voltage into another, higher or lower DC voltage \u2013 for example, 80 V from a forklift battery into a stable 24 V for the on-board network. A complete Demke Electronic DC\/DC converter includes not only the power stage but also the control loop, power switches and EMI filters, so the output voltage is delivered stable, low-noise and compliant with EMC standards.\"}},{\"@type\":\"Question\",\"name\":\"What is a wide-range or ultra-wide-range input?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A wide-range input allows a DC\/DC converter to operate stably over a very large input voltage range \u2013 at Demke up to a ratio of 1:10, e.g. from 12 V (lead-acid) to 120 V (lithium). A single converter thus covers 24 V, 48 V and 80 V vehicle platforms, dramatically reducing variant diversity, stock and effort in engineering and purchasing. Example: the DC-Converter 755-24-SD operates from 18 to 110 VDC.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between a buck, a boost and a buck-boost converter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A buck (step-down) converter produces a lower output voltage, a boost (step-up) converter a higher one than the input. A buck-boost converter does both: it delivers a stable output voltage regardless of whether the input voltage is above or below it. This is essential in battery applications, because battery voltage varies widely with the state of charge \u2013 for example a 24 V output from a 24 V battery that swings between 18 V and 30 V.\"}},{\"@type\":\"Question\",\"name\":\"When do I need an isolated converter, and when is a non-isolated one sufficient?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"You need an isolated converter when input and output circuits must have separate potentials \u2013 for example to protect sensitive sensors, avoid ground loops, meet safety requirements, or comply with standards (e.g. railway). A non-isolated converter is sufficient when both circuits may share the same ground potential, such as powering controllers and terminals from the same vehicle network. If in doubt, we are happy to advise you.\"}},{\"@type\":\"Question\",\"name\":\"Where are Demke DC\/DC converters developed and manufactured?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Development takes place in Switzerland: Demke Electronic GmbH is based in Wil SG and has specialized in DC\/DC converters since 2008. Manufacturing is carried out to ISO 9001:2015 by our long-standing production partner Elotec Fischer GmbH in Germany \u2013 Designed in Switzerland, Made in Germany. Every single device is 100% tested before delivery.\"}},{\"@type\":\"Question\",\"name\":\"Where can I find product datasheets?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Every product page offers the complete technical datasheet as a PDF download. It contains all electrical specifications (input, output, control), thermal characteristics, EMC compliance, mechanical dimensions and the pin assignment. If you are missing a parameter or need 3D data, derating curves or application notes, contact us directly.\"}},{\"@type\":\"Question\",\"name\":\"Which countries does Demke Electronic GmbH deliver to?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"We deliver within Switzerland, Germany, the European Union and, in principle, worldwide. Swiss customers are supplied directly from our warehouse in Switzerland; international deliveries are generally shipped from our production site in Germany. We comply with all applicable export control, embargo and sanctions regulations. Depending on the destination country, product, recipient and intended use, additional checks or approvals may be required.\"}},{\"@type\":\"Question\",\"name\":\"Which DC\/DC converter fits forklifts and industrial trucks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For forklifts and industrial trucks we recommend our rugged converters with ultra-wide-range input, covering all common battery voltages \u2013 24 V, 36 V, 48 V and 80 V \u2013 with a single device. They stabilize 12 V and 24 V on-board networks for terminals, sensors and communication, are fully potted, vibration-proof and deliver full power from \u221240 \u00b0C to +85 \u00b0C. One converter variant serves your entire vehicle fleet.\"}},{\"@type\":\"Question\",\"name\":\"Which Incoterms does Demke Electronic offer?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In principle, we supply according to the following Incoterms: Within Switzerland and Germany: EXW, DAPWithin the EU: DAPThird countries: DAP, FCA We are happy to review alternative Incoterms individually, depending on the destination country and the requirements of the respective project.\"}},{\"@type\":\"Question\",\"name\":\"Which standards and certifications do Demke DC\/DC converters meet?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Our latest developments meet the EMC standards EN 61000-6-2 (industrial immunity), EN 61000-4-2 through 4-6 (ESD, RF fields, burst, surge, conducted disturbances) as well as EN 61000-6-3\/6-4 (emission for residential and industrial environments). The DC-Converter 729-57-ON holds the automotive road approval E13-10R-05. On customer request we flexibly certify additional standards, e.g. UL or ECE.\"}},{\"@type\":\"Question\",\"name\":\"Why do you \\u0022convert power like the octopus changes its shape\\u0022?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The octopus is our guiding principle: it adapts to any environment in an instant \u2013 just like our DC\/DC converters, which adapt to the most diverse voltage platforms thanks to their wide-range input. Its three hearts stand for our values: acting responsibly towards stakeholders and the environment, investing in sustainable research and development, and responding flexibly to customer needs. Strong and flexible like an octopus \u2013 power converters with heart.\"}}]}<\/script><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e9a0d50 e-flex e-con-boxed e-con e-parent\" data-id=\"e9a0d50\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e03c061 elementor-widget elementor-widget-html\" data-id=\"e03c061\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"rainbow-divider\"><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c5bb976 e-flex e-con-boxed e-con e-parent\" data-id=\"c5bb976\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-359dbe7 elementor-widget__width-inherit large elementor-widget elementor-widget-heading\" data-id=\"359dbe7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Any further questions?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20c7989 elementor-widget__width-inherit xsmall elementor-widget elementor-widget-text-editor\" data-id=\"20c7989\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>No problem. Check out our glossary or get in touch with us. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0236c6 button-1 xsmall elementor-widget elementor-widget-button\" data-id=\"b0236c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/demke-electronic.com\/en\/glossary\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Glossary<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed2ae3c button-2 xsmall elementor-widget elementor-widget-button\" data-id=\"ed2ae3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/demke-electronic.com\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Go to the contact page<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Answers about DC\/DC converters FAQ: Frequently Asked Questions About DC\/DC Converters Whether it is input voltage, galvanic isolation, efficiency, CC\/CV or the right design for your application: here we answer common technical questions about DC\/DC converters, how to choose them and how they are used. The information is intended for engineers, designers, technical buyers and [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":7735,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-7789","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/pages\/7789","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/comments?post=7789"}],"version-history":[{"count":8,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/pages\/7789\/revisions"}],"predecessor-version":[{"id":10682,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/pages\/7789\/revisions\/10682"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/media\/7735"}],"wp:attachment":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/media?parent=7789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}