DC\/DC boost converter 12V 24V 200W. Short-circuit proof buck and boost DC charging converter for primary use in supercapacitor powered autonomous systems with output-side backup battery. The LEX version has the advantage of a very low input voltage of down to 7V. Output-side integrated reverse polarity protection diodes enable battery charging. Customizing DC\/DC converters as DC\/DC Converter 12V, DC\/DC Converter 13.8V or DC\/DC Converter 27V and much more can be realized.<\/p>\n","protected":false},"excerpt":{"rendered":"
The 257LEX-24-SD by Demke Electronic is a non-isolated DC\/DC buck-boost converter for a nominal input voltage of 12 VDC. It operates across an input voltage range of 7 to 35 VDC and delivers 24 VDC at up to 8 A, equivalent to 200 W of output power. Efficiency reaches up to97% at nominal input voltage and full load.<\/p>\n","protected":false},"featured_media":8258,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[93],"product_tag":[],"product_application":[158,112,111,156,154,97,160,110,162],"product_standard":[146,140,138,144,126,130,136,132,122,120,118,134,142],"class_list":["post-8257","product","type-product","status-publish","has-post-thumbnail","product_cat-dc-dc-auf-abwaertswandler","first","instock","shipping-taxable","product-type-simple"],"acf":{"vin_min":7,"vin_max":35,"vin_nom":12,"vin_peak":37,"efficiency_max":97,"vout":24,"iout":8,"pout":200,"output_configuration":"single","em_filter":"input_output","switching_frequency":120,"max_capacitive_load":"infinite","shutdown_voltage_min":-0.2,"shutdown_voltage_max":2.8,"enable_voltage_min":0,"enable_voltage_max":0,"switch_high_voltage_min":0,"switch_high_voltage_max":0,"mounting":"wall","connection_type":"Flachstecker","plug_pin_diameter":"","cable_lengths":"","produktstatus":"bto","temp_min":-40,"temp_max":85,"thermal_shutdown_temp":90,"ip_rating":"","mtbf":"","technical_features":["cc_cv","parallel","decoupling_diode","no_load_short_circuit","emi_input_output","no_derating","input_low_ripple_noise","ultrawide_input"],"remote_control":false,"isolation_type":"non_isolated","potting":false,"certifications":["reach","rohs","ce"],"datasheet_de":"https:\/\/demke-electronic.com\/wp-content\/uploads\/257.004_DB.pdf","datasheet_en":"https:\/\/demke-electronic.com\/wp-content\/uploads\/257.004_DB_EN.pdf","drawing":"https:\/\/demke-electronic.com\/wp-content\/uploads\/257.004_TZ.pdf","safety_instructions":"https:\/\/demke-electronic.com\/wp-content\/uploads\/257.004_SI.pdf","step":"","download_base":"257.004","step_model":"size_90x90x26","pim_id":"237979000000156831","web_visible":true,"sync_status":"success","last_sync":"2026-09-01 08:46:59","successor_sku":"","alternative_skus":"","h1_de":"257LEX-24-SD | DC\/DC buck-boost converter 12 VDC to 24 VDC, 200 W","h1_en":"257LEX-24-SD | DC\/DC buck-boost converter 12 VDC to 24 VDC, 200 W"},"_links":{"self":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product\/8257","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/media\/8258"}],"wp:attachment":[{"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/media?parent=8257"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product_brand?post=8257"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product_cat?post=8257"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product_tag?post=8257"},{"taxonomy":"product_application","embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product_application?post=8257"},{"taxonomy":"product_standard","embeddable":true,"href":"https:\/\/demke-electronic.com\/en\/wp-json\/wp\/v2\/product_standard?post=8257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}