{"id":3897,"date":"2026-06-09T01:15:31","date_gmt":"2026-06-09T01:15:31","guid":{"rendered":"https:\/\/materialparts.com\/mf-fsmf020x-2\/"},"modified":"2026-06-09T01:15:31","modified_gmt":"2026-06-09T01:15:31","slug":"mf-fsmf020x-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/mf-fsmf020x-2\/","title":{"rendered":"MF-FSMF020X-2"},"content":{"rendered":"

Productos<\/h2>\n

The MF-FSMF020X-2 from Bourns is a PTC resettable fuse in the Multifuse MF-FSMF series with 200mA hold current and 500mA trip current at 9VDC. This compact 0603 device provides reliable overcurrent protection with automatic recovery.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Hold Current<\/td>\n200mA<\/td>\n<\/tr>\n
Trip Current<\/td>\n500mA<\/td>\n<\/tr>\n
Maximum Voltage<\/td>\n9VDC<\/td>\n<\/tr>\n
Max Current Rating<\/td>\n40A<\/td>\n<\/tr>\n
Initial Resistance<\/td>\n0.55 Ohm min<\/td>\n<\/tr>\n
Post-Trip Resistance<\/td>\n3.5 Ohm max<\/td>\n<\/tr>\n
Power Dissipation<\/td>\n500mW<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40 to +85C<\/td>\n<\/tr>\n
Paquete<\/td>\n0603 (1608 Metric)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • PTC polymer resettable fuse with auto-recovery<\/li>\n
  • freeXpansion design for reliable tripping<\/li>\n
  • Low profile 0.65mm max height<\/li>\n
  • Nickel\/gold plated terminals<\/li>\n
  • RoHS compliant and halogen free<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • USB port overcurrent protection<\/li>\n
    • Automotive ECU protection<\/li>\n
    • Portable electronics battery protection<\/li>\n
    • Game console port protection<\/li>\n
    • IoT device power rail protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MF-FSMF020X-2 from Bourns is a PTC resettable fuse in the Multifuse MF-FSMF series with 200mA hold current and 500mA trip current at 9VDC. This compact 0603 device provides reliable overcurrent protection with automatic recovery. Key Specifications Hold Current 200mA Trip Current 500mA Maximum Voltage 9VDC Max Current Rating 40A Initial Resistance 0.55 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[57,13],"tags":[],"chip_brand":[220],"class_list":["post-3897","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-bourns"],"acf":{"brief_explanation":"PPTC resettable fuse, 200mA hold, 500mA trip, 9V, 0603 SMD","date_code":"","package_case":"0603 (1608 Metric, 1.85 x 1.05 x 0.65 mm)","in_stock":3850,"datasheet":"https:\/\/www.bourns.com\/docs\/product-datasheets\/mf-fsmf.pdf","price":"$0.22 @ 1ku","product_introduction":"The MF-FSMF020X-2 is a member of the Bourns Multifuse MF-FSMF series of PPTC resettable fuses. This device provides overcurrent protection for sensitive electronic circuits by transitioning from a low-resistance state to a high-resistance state when an overcurrent condition occurs. Once the fault is removed and power is cycled, the device resets automatically. The freeXpansion design ensures consistent and reliable tripping performance across a wide temperature range. With its compact 0603 footprint and low 0.65mm profile, it is ideal for space-constrained applications such as portable electronics, USB peripherals, and automotive control modules.","working_principle":"The MF-FSMF020X-2 operates on the PTC polymer principle. Under normal conditions (current below Ihold), the device maintains low resistance. When overcurrent exceeds the trip current (Itrip), internal polymer heats and transitions from crystalline to amorphous state, breaking conductive pathways and increasing resistance by orders of magnitude. Once power is removed and the device cools, the polymer contracts and conductive pathways reform, restoring the low-resistance state. The freeXpansion design allows the polymer element to expand freely within the concave package for repeatable protection cycling.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>Terminal 1<\/td>Input connection<\/td><\/tr>
      2<\/td>Terminal 2<\/td>Output connection<\/td><\/tr><\/table>","application_scenarios":"
      • USB port protection: 200mA hold current matches USB 2.0 low-power device requirements<\/li>
      • Automotive ECU protection: Protects control modules from transient overcurrent in 12V systems<\/li>
      • Portable electronics: Compact 0603 fits tight PCB layouts in smartphones and wearables<\/li>
      • Battery management: Prevents excessive discharge current in Li-ion battery packs<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Bourns<\/td>MF-FSMF010X-2<\/td>0603<\/td>100mA hold version<\/td><\/tr>
        Bourns<\/td>MF-FSMF035X-2<\/td>0603<\/td>350mA hold version<\/td><\/tr>
        Littelfuse<\/td>nanoSMD020F-2<\/td>0603<\/td>200mA hold PPTC<\/td><\/tr>
        TE Connectivity<\/td>MICROSMD020F-2<\/td>0603<\/td>200mA hold PPTC<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=3897"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3897\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=3897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=3897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=3897"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=3897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}