{"id":9692,"date":"2026-07-05T09:38:16","date_gmt":"2026-07-05T09:38:16","guid":{"rendered":"https:\/\/materialparts.com\/hfd42-12-3sr-2\/"},"modified":"2026-07-05T09:38:16","modified_gmt":"2026-07-05T09:38:16","slug":"hfd42-12-3sr-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/hfd42-12-3sr-2\/","title":{"rendered":"HFD42\/12-3SR"},"content":{"rendered":"<h2>\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n<p>The HFD42\/12-3SR is an ultra-compact 4th generation signal relay manufactured by Xiamen Hongfa (Hongfa). It features a 12V DC coil with DPDT (2 Form C) contacts rated at 2A\/220VDC. The relay offers 2.5kV surge voltage between coil and contacts, IEC 62368-1 compliance, and an ultra-narrow 5.7mm width suitable for dense PCB layouts.<\/p>\n<h2>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<ul>\n<li>Coil Voltage: 12V DC<\/li>\n<li>Coil Type: Monostable<\/li>\n<li>Coil Power: 0.23W<\/li>\n<li>Coil Resistance: 1.028k\u03a9<\/li>\n<li>Contact Form: DPDT (2 Form C)<\/li>\n<li>Contact Material: AgNi + gold plated<\/li>\n<li>Max Switching Current: 1A (AC), 2A (DC)<\/li>\n<li>Max Switching Voltage: 250VAC, 220VDC<\/li>\n<li>Max Switching Power: 60W \/ 62.5VA<\/li>\n<li>Operate Time: \u22643ms<\/li>\n<li>Release Time: \u22643ms<\/li>\n<li>Surge Voltage (coil-contact): 2.5kV<\/li>\n<li>Electrical Endurance: 100,000 operations<\/li>\n<li>Mechanical Endurance: 100,000,000 operations<\/li>\n<li>Package: SMD Gull Wing<\/li>\n<li>Dimensions: 10.6 x 5.7 x 9mm (THT), 10 x 7.5 x 5.65mm (SMD)<\/li>\n<li>Operating Temperature: -40\u00b0C ~ +85\u00b0C<\/li>\n<\/ul>\n<h2>\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n<ul>\n<li>Ultra-narrow 5.7mm width for high-density mounting<\/li>\n<li>2.5kV surge voltage between coil and contacts<\/li>\n<li>IEC 62368-1 compliant<\/li>\n<li>DPDT dual contact with AgNi+Au plating<\/li>\n<li>Sealed SMD and THT package options<\/li>\n<li>Low coil power consumption (0.23W)<\/li>\n<\/ul>\n<h2>\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n<ul>\n<li>Program-controlled switches and telecom<\/li>\n<li>Industrial automation and control<\/li>\n<li>Office automation equipment<\/li>\n<li>Security and surveillance systems<\/li>\n<li>Temperature control and ATE<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The HFD42\/12-3SR is an ultra-compact 4th generation signal relay manufactured by Xiamen Hongfa (Hongfa). It features a 12V DC coil with DPDT (2 Form C) contacts rated at 2A\/220VDC. The relay offers 2.5kV surge voltage between coil and contacts, IEC 62368-1 compliance, and an ultra-narrow 5.7mm width suitable for dense PCB layouts. Key [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[938],"chip_brand":[308],"class_list":["post-9692","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-hfd42-12-3sr","chip_brand-hongfa"],"acf":{"brief_explanation":"4th-gen signal relay, 12VDC coil, DPDT, 2A\/220VDC, 2.5kV surge, SMD 5.7mm wide, -40~85\u00b0C","date_code":"","package_case":"SMD Gull Wing (10.6 x 5.7 x 9mm)","in_stock":12737,"datasheet":"https:\/\/www.hongfa.cn\/Product\/Detail\/HFD42_24-3","price":"$1.48 @ 26ku","product_introduction":"The HFD42\/12-3SR is Hongfa's 4th generation ultra-narrow signal relay with 12VDC coil, DPDT contacts, and 2.5kV surge voltage rating for industrial and telecom applications.","working_principle":"Applying 12V DC to the coil generates a magnetic field that moves the armature, switching the DPDT contacts from their normally closed to normally open position. When coil voltage is removed, a return spring restores the contacts to their original state. The sealed construction provides environmental protection.","pin_description":"<table><tr><th>Pin<\/th><th>Function<\/th><\/tr><tr><td>1, 8<\/td><td>Coil terminals (+, -)<\/td><\/tr><tr><td>2, 7<\/td><td>Common (COM) contacts<\/td><\/tr><tr><td>3, 6<\/td><td>Normally Open (NO) contacts<\/td><\/tr><tr><td>4, 5<\/td><td>Normally Closed (NC) contacts<\/td><\/tr><\/table>","application_scenarios":"<ul><li>Signal switching in telecom and datacom equipment<\/li><li>Industrial PLC output modules<\/li><li>Automatic test equipment (ATE)<\/li><li>Audio and video signal routing<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Coil<\/th><th>Width<\/th><\/tr><tr><td>HFD4\/12-SR<\/td><td>Hongfa<\/td><td>12VDC<\/td><td>7.5mm<\/td><\/tr><tr><td>G6K-2F-Y 12VDC<\/td><td>Omron<\/td><td>12VDC<\/td><td>5.2mm<\/td><\/tr><tr><td>RM85-2011-05-12<\/td><td>TE<\/td><td>12VDC<\/td><td>7.1mm<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=9692"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9692\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9692"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9692"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}