{"id":10437,"date":"2026-07-19T13:49:09","date_gmt":"2026-07-19T13:49:09","guid":{"rendered":"https:\/\/materialparts.com\/43045-2028\/"},"modified":"2026-07-19T13:49:09","modified_gmt":"2026-07-19T13:49:09","slug":"43045-2028","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/43045-2028\/","title":{"rendered":"43045-2028"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The 43045-2028 is a 20-circuit dual-row PCB header from Molex’s Micro-Fit 3.0 series. With a 3.0mm pitch and through-hole mounting with PCB polarizing pegs, this fully shrouded power header delivers up to 8.5A per contact, providing high-density wire-to-board power distribution for applications requiring 20 separate power or signal connections.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Series<\/td>\nMicro-Fit 3.0 (43045)<\/td>\n<\/tr>\n
Number of Contacts<\/td>\n20<\/td>\n<\/tr>\n
Pitch<\/td>\n3.0 mm<\/td>\n<\/tr>\n
Number of Rows<\/td>\n2<\/td>\n<\/tr>\n
Orientation<\/td>\nVertical<\/td>\n<\/tr>\n
Shrouding<\/td>\nFully Shrouded<\/td>\n<\/tr>\n
Current Rating<\/td>\n5A typical, 8.5A max per contact<\/td>\n<\/tr>\n
Voltage Rating<\/td>\n600V max<\/td>\n<\/tr>\n
Contact Material<\/td>\nBrass<\/td>\n<\/tr>\n
Contact Plating<\/td>\nTin<\/td>\n<\/tr>\n
Housing Material<\/td>\nHigh Temperature Thermoplastic LCP<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +105\u00b0C<\/td>\n<\/tr>\n
Mounting<\/td>\nThrough Hole (with PCB Pegs)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 20-circuit dual-row vertical design for high-density power routing<\/li>\n
  • Fully shrouded 4-wall housing for contact protection<\/li>\n
  • PCB polarizing pegs and kinked pins for secure assembly<\/li>\n
  • Positive locking ramp prevents accidental disconnection<\/li>\n
  • Fully isolated dual-beam contacts minimize arcing potential<\/li>\n
  • High-temperature LCP housing compatible with lead-free reflow<\/li>\n
  • Glow-wire compliant for IEC 60335-1 applications<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Enterprise server power distribution boards<\/li>\n
    • Industrial automation multi-channel I\/O connections<\/li>\n
    • Consumer appliance multi-motor and sensor wiring<\/li>\n
    • Telecommunications rack power and signal distribution<\/li>\n
    • Medical imaging equipment internal power harness<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 43045-2028 is a 20-circuit dual-row PCB header from Molex’s Micro-Fit 3.0 series. With a 3.0mm pitch and through-hole mounting with PCB polarizing pegs, this fully shrouded power header delivers up to 8.5A per contact, providing high-density wire-to-board power distribution for applications requiring 20 separate power or signal connections. Key Specifications Series Micro-Fit […]<\/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":[1741],"chip_brand":[256],"class_list":["post-10437","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-43045-2028","chip_brand-molex"],"acf":{"brief_explanation":"Molex Micro-Fit 3.0 header, 20 circuits, 3.0mm pitch, dual row, vertical, tin, TH","date_code":"","package_case":"Through Hole, Vertical, 3.0mm pitch, dual row","in_stock":3891,"datasheet":"https:\/\/www.molex.com\/en-us\/products\/connectors\/power-connectors\/micro-fit-3","price":"$2.75 @ 1ku","product_introduction":"The Molex 43045-2028 is a 20-circuit dual-row vertical PCB header from the Micro-Fit 3.0 connector system. Providing up to 8.5A per contact in a 600V-rated compact 3.0mm pitch footprint, this header is designed for high-density wire-to-board power and signal distribution. The 20-circuit count supports complex multi-wire harnesses in server, industrial, and telecom applications.","working_principle":"The 43045-2028 uses the standard Micro-Fit 3.0 dual-beam contact system with fully isolated contacts providing four points of contact per mating interface. The positive locking ramp engages the mating receptacle housing to prevent accidental disconnection. The LCP housing tolerates lead-free reflow soldering temperatures, while the kinked through-hole pins and PCB polarizing pegs ensure secure and accurate board attachment.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1-10<\/td>Row A Contacts<\/td>Power\/Signal<\/td>Row A, Circuits 1-10<\/td><\/tr>
      11-20<\/td>Row B Contacts<\/td>Power\/Signal<\/td>Row B, Circuits 1-10<\/td><\/tr>
      \u2014<\/td>PCB Pegs<\/td>Mechanical<\/td>Polarization and board alignment<\/td><\/tr><\/table>","application_scenarios":"
      • Enterprise server multi-rail power distribution board<\/li>
      • Industrial PLC multi-channel analog I\/O power header<\/li>
      • Consumer HVAC unit multi-sensor and motor wiring interface<\/li>
      • Telecom base station multi-sector power and alarm connections<\/li>
      • Medical imaging system multi-subsystem power distribution<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Molex<\/td>43045-2012<\/td>3.0mm, TH<\/td>Variant with different plating<\/td><\/tr>
        Molex<\/td>43045-2022<\/td>3.0mm, RA<\/td>Right angle variant<\/td><\/tr>
        Molex<\/td>43045-2212<\/td>3.0mm, TH<\/td>22-circuit variant<\/td><\/tr>
        TE Connectivity<\/td>1-770968-8<\/td>3.0mm<\/td>Comparable Micro-Fit header<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/10437","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=10437"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/10437\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=10437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=10437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=10437"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}