{"id":10756,"date":"2026-07-20T12:43:47","date_gmt":"2026-07-20T12:43:47","guid":{"rendered":"https:\/\/ic-vendor.com\/fsmsmtr\/"},"modified":"2026-07-20T12:43:47","modified_gmt":"2026-07-20T12:43:47","slug":"fsmsmtr","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/ar\/fsmsmtr\/","title":{"rendered":"FSMSMTR"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The FSMSMTR from Littelfuse is a surface-mount fast-acting chip fuse from the Nano Squared (Nano2) 453 series, designed for secondary circuit overcurrent protection in space-constrained applications. It provides very fast-acting (FF) protection in a compact ceramic body with 125 V rating.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n
Rated Voltage<\/td>\n125 VAC \/ 125 VDC<\/td>\n<\/tr>\n
Fuse Type<\/td>\nVery Fast-Acting (FF)<\/td>\n<\/tr>\n
Breaking Capacity<\/td>\n50 A at 125 VAC<\/td>\n<\/tr>\n
Body Material<\/td>\nCeramic<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55 to 125 degC<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nNano2 SMD (chip fuse)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Very fast-acting (FF) opening characteristic<\/li>\n
  • Nano2 compact chip fuse form factor<\/li>\n
  • Ceramic body for high temperature stability<\/li>\n
  • Wide operating temperature range: -55 to 125 degC<\/li>\n
  • Silver-plated brass cap terminations<\/li>\n
  • Halogen-free and RoHS compliant<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Notebook and laptop secondary protection<\/li>\n
    • LCD\/PDP TV power supply protection<\/li>\n
    • Server and networking equipment<\/li>\n
    • Portable electronics overcurrent protection<\/li>\n
    • Power supply output protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The FSMSMTR from Littelfuse is a surface-mount fast-acting chip fuse from the Nano Squared (Nano2) 453 series, designed for secondary circuit overcurrent protection in space-constrained applications. It provides very fast-acting (FF) protection in a compact ceramic body with 125 V rating. Key Specifications Rated Voltage 125 VAC \/ 125 VDC Fuse Type Very […]<\/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],"tags":[2097],"chip_brand":[200],"class_list":["post-10756","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","tag-fsmsmtr","chip_brand-littelfuse"],"acf":{"brief_explanation":"Nano2 fast-acting SMD chip fuse, 125V, FF type, ceramic body, -55 to 125C","date_code":"","package_case":"Nano2 SMD Chip Fuse","in_stock":3450,"datasheet":"https:\/\/www.littelfuse.com\/products\/fuses\/surface-mount-fuses\/nano-2-fuses\/453","price":"$0.28 @ 1ku","product_introduction":"The FSMSMTR from Littelfuse is a surface-mount chip fuse from the Nano Squared (Nano2) 453 series designed for secondary circuit overcurrent protection. The very fast-acting (FF) characteristic ensures rapid interruption of fault currents, protecting sensitive semiconductor components from damage during overcurrent events. The ceramic body provides excellent thermal stability and resistance to solder heat during reflow assembly. Rated at 125 VAC\/125 VDC with a breaking capacity of 50 A, the fuse is suitable for a wide range of secondary circuit protection applications in computing, consumer electronics, and networking equipment.","working_principle":"The FSMSMTR uses a fusible element within a sealed ceramic body that melts and interrupts the circuit when the current exceeds the rated value for a defined time. The very fast-acting (FF) characteristic means the fuse opens very quickly at moderate overcurrent levels, providing superior protection for sensitive semiconductor devices. The ceramic body encapsulates the fuse element, preventing arcing and containing the molten metal safely when the fuse blows. The silver-plated brass cap terminations provide reliable solder joints and low contact resistance in surface-mount applications.","pin_description":"
      Terminal<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Terminal 1<\/td>Passive<\/td>Fuse terminal 1<\/td><\/tr>
      2<\/td>Terminal 2<\/td>Passive<\/td>Fuse terminal 2<\/td><\/tr><\/table>","application_scenarios":"
      • Notebook and laptop secondary power rail protection<\/li>
      • LCD and PDP television power supply output fusing<\/li>
      • PC server and storage equipment circuit protection<\/li>
      • Portable electronics battery protection<\/li>
      • Networking equipment DC rail overcurrent protection<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Littelfuse<\/td>045303.5<\/td>Nano2<\/td>3.5A 125V specific variant<\/td><\/tr>
        Bel Fuse<\/td>0ZCF0035FF2C<\/td>SMD<\/td>Fast-acting chip fuse<\/td><\/tr>
        Schurter<\/td>USF 0305.500<\/td>SMD<\/td>Very fast-acting micro fuse<\/td><\/tr>
        TE Connectivity<\/td>432932<\/td>SMD<\/td>Surface-mount fast fuse<\/td><\/tr>
        Eaton<\/td>PTS502402S050V<\/td>SMD<\/td>Fast-acting chip fuse<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/comments?post=10756"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/10756\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=10756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=10756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=10756"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=10756"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}