{"id":9653,"date":"2026-07-05T08:32:05","date_gmt":"2026-07-05T08:32:05","guid":{"rendered":"https:\/\/materialparts.com\/0685t4000-01\/"},"modified":"2026-07-05T08:32:05","modified_gmt":"2026-07-05T08:32:05","slug":"0685t4000-01","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/0685t4000-01\/","title":{"rendered":"0685T4000-01"},"content":{"rendered":"

Productos<\/h2>\n

The 0685T4000-01 is a 4A, 63V surface mount slow blow chip fuse from Bel Fuse Inc.’s C1T series. Housed in a 1206 (3216 metric) ceramic package, this fuse provides overcurrent protection with a time-delay (slow blow) characteristic that tolerates inrush currents while protecting against sustained overloads. The -01 suffix indicates tape and reel packaging with 5000 pieces per 7-inch reel. The device is AEC-Q200 qualified, making it suitable for automotive and industrial applications.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Current Rating<\/td>\n4 A<\/td>\n<\/tr>\n
Voltage Rating<\/td>\n63 VAC \/ 63 VDC<\/td>\n<\/tr>\n
Breaking Capacity<\/td>\n50 A @ 63VAC\/DC<\/td>\n<\/tr>\n
Fuse Characteristic<\/td>\nSlow Blow (Time-Lag)<\/td>\n<\/tr>\n
Nominal Cold Resistance<\/td>\n0.030 \u03a9<\/td>\n<\/tr>\n
Maximum Voltage Drop @ 100% In<\/td>\n0.195 V<\/td>\n<\/tr>\n
Nominal Melting I\u00b2t @ 10x In<\/td>\n2.56 A\u00b2s<\/td>\n<\/tr>\n
Maximum Power Dissipation @ 100% In<\/td>\n0.78 W<\/td>\n<\/tr>\n
Marking Code<\/td>\nT4<\/td>\n<\/tr>\n
Paquete<\/td>\n1206 (3.20 x 1.58 x 0.63 mm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-55\u00b0C to +125\u00b0C<\/td>\n<\/tr>\n
Agency Approvals<\/td>\nAEC-Q200, cURus, CE, TUV<\/td>\n<\/tr>\n
Embalaje<\/td>\nTape & Reel, 5000 pcs\/reel (-01)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Slow blow (time-lag) characteristic tolerates inrush currents from capacitive and inductive loads<\/li>\n
  • AEC-Q200 automotive qualified for harsh environment applications<\/li>\n
  • Ceramic 1206 surface mount package for automated PCB assembly<\/li>\n
  • Low 30m\u03a9 cold resistance minimizes voltage drop and power loss<\/li>\n
  • 50A breaking capacity at rated voltage for safe fault interruption<\/li>\n
  • Multiple agency approvals (cURus, CE, TUV) for global compliance<\/li>\n
  • Rated for 4 hours minimum continuous operation at rated current<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Automotive electronics power line protection<\/li>\n
    • Industrial equipment overcurrent protection<\/li>\n
    • Power supply input and output fuse protection<\/li>\n
    • LCD monitor and medical equipment circuit protection<\/li>\n
    • Notebook and office equipment DC bus fusing<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 0685T4000-01 is a 4A, 63V surface mount slow blow chip fuse from Bel Fuse Inc.’s C1T series. Housed in a 1206 (3216 metric) ceramic package, this fuse provides overcurrent protection with a time-delay (slow blow) characteristic that tolerates inrush currents while protecting against sustained overloads. The -01 suffix indicates tape and reel […]<\/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":[899],"chip_brand":[927],"class_list":["post-9653","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-0685t4000-01","chip_brand-bel-fuse"],"acf":{"brief_explanation":"4A 63V slow blow SMD chip fuse, 1206 ceramic, AEC-Q200, 50A breaking, Bel Fuse C1T","date_code":"","package_case":"1206 (3216 Metric) (3.20 x 1.58 x 0.63 mm)","in_stock":350,"datasheet":"https:\/\/www.belfuse.com\/media\/datasheets\/products\/circuit-protection\/ds-cp-c1t-series.pdf","price":"$0.27 @ 1ku","product_introduction":"The Bel Fuse 0685T4000-01 is a 4A rated slow blow (time-lag) surface mount chip fuse from the C1T series, designed for overcurrent protection in automotive, industrial, and consumer electronics applications. The C1T series uses a ceramic body construction that provides stable performance and reliable arc suppression during fault interruption. The slow blow characteristic allows the fuse to withstand short-duration inrush currents \u2014 such as those from capacitive input filters and motor startup \u2014 without nuisance tripping, while still protecting against sustained overloads. With a 63V AC\/DC voltage rating and 50A breaking capacity, the fuse safely interrupts fault currents up to 50A. The 30m\u03a9 cold resistance and 0.78W maximum power dissipation minimize voltage drop and self-heating during normal operation. The AEC-Q200 qualification ensures reliability under automotive thermal cycling and vibration conditions.","working_principle":"The 0685T4000-01 slow blow fuse uses a fusible element with a designed thermal mass that requires sustained overcurrent to melt. Unlike fast-acting fuses that open quickly at modest overloads, the slow blow element absorbs the I\u00b2t energy of transient inrush currents without opening. The fuse element is a specially shaped metal alloy (typically a low-melting-point alloy with a constriction or weak link) inside the ceramic 1206 body. During normal operation at or below the 4A rated current, the element stays below its melting temperature indefinitely (rated for minimum 4 hours at 100% In). When a sustained overcurrent exceeds the fuse's time-current characteristic curve, the element heats to its melting point and opens the circuit. The ceramic body contains the arc that forms during interruption and channels it through the breaking capacity rating. The nominal melting I\u00b2t of 2.56 A\u00b2s at 10x rated current defines the thermal energy threshold for fuse opening.","pin_description":"
      Terminal<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Terminal 1<\/td>Connection<\/td>Fuse element terminal, solder pad 1<\/td><\/tr>
      2<\/td>Terminal 2<\/td>Connection<\/td>Fuse element terminal, solder pad 2<\/td><\/tr><\/table>","application_scenarios":"
      • Automotive ECU and infotainment power rail overcurrent protection<\/li>
      • Industrial power supply DC output fuse protection<\/li>
      • Medical equipment and LCD monitor circuit protection<\/li>
      • Notebook adapter and charger output fusing<\/li>
      • Office electronics and distributed power bus fusing<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Bel Fuse<\/td>0685T3000-01<\/td>1206<\/td>3A variant, same C1T series<\/td><\/tr>
        Bel Fuse<\/td>0685T5000-01<\/td>1206<\/td>5A variant, same C1T series<\/td><\/tr>
        Littelfuse<\/td>0435004.WR<\/td>1206<\/td>4A slow blow 63V, similar spec<\/td><\/tr>
        Bourns<\/td>MF-PSMF024-2<\/td>1206<\/td>2A slow blow, alternative rating<\/td><\/tr>
        Schurter<\/td>USF 1206-4A<\/td>1206<\/td>4A slow blow chip fuse<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/9653","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=9653"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/9653\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=9653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=9653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=9653"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=9653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}