{"id":5647,"date":"2026-06-11T03:49:03","date_gmt":"2026-06-11T03:49:03","guid":{"rendered":"https:\/\/materialparts.com\/0451005-mrl\/"},"modified":"2026-06-12T03:26:28","modified_gmt":"2026-06-12T03:26:28","slug":"0451005-mrl","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/0451005-mrl\/","title":{"rendered":"0451005.MRL"},"content":{"rendered":"

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

The 0451005.MRL from Littelfuse is a 5A 125VAC time-delay (slow-blow) ceramic fuse in 5x20mm package for overcurrent protection with inrush current tolerance.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n5x20mm ceramic<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Industrial control<\/li>\n
    • Consumer electronics<\/li>\n
    • Communication equipment<\/li>\n
    • Power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 0451005.MRL from Littelfuse is a 5A 125VAC time-delay (slow-blow) ceramic fuse in 5x20mm package for overcurrent protection with inrush current tolerance. Key Specifications Package 5x20mm ceramic Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","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":[200],"class_list":["post-5647","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-littelfuse"],"acf":{"brief_explanation":"5A 125VAC slow-blow fuse, 5x20mm ceramic","date_code":"","package_case":"5x20mm ceramic","in_stock":13944,"datasheet":"https:\/\/www.littelfuse.com\/media\/littelfuse\/data-sheets\/littelfuse_451_series.pdf","price":"$0.40 @ 1ku","product_introduction":"The 0451005.MRL from Littelfuse is a 5A 125VAC time-delay (slow-blow) ceramic fuse in 5x20mm package for overcurrent protection with inrush current tolerance.","working_principle":"The 0451005.MRL is a 5A 250VAC slow-blow (time-lag) ceramic fuse from Littelfuse in the standard 5x20mm cylindrical package. The slow-blow characteristic means the fuse can withstand short-duration current surges (such as motor startup inrush or power supply turn-on) without blowing, while still protecting against sustained overcurrent. The time-current characteristic is: 5A (rated) = no blow; 7.5A (150%) = blows in >60 seconds; 10A (200%) = blows in 0.5-5 seconds; 25A (500%) = blows in 0.05-0.2 seconds. The ceramic body (vs glass) provides better arc-quenching capability and mechanical strength, and prevents the fuse from shattering during a high-current fault. The breaking capacity is 100A at 250VAC, meaning it can safely interrupt a fault current of 100A without arcing or fire. The MRL suffix specifies the time-lag (slow-blow) characteristic per IEC 60127-2 Sheet III. The cold resistance is approximately 50mOhm, resulting in 1.25W power dissipation at rated current (5A x 5A x 0.05 = 1.25W). The 5x20mm form factor is the most common fuse size in IEC-standard equipment, found in power supplies, instrument panels, and consumer electronics. Installation requires a fuse holder (clip or screw-type) rated for the same voltage and current.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Lead 1<\/td>Terminal<\/td>Fuse terminal 1 (connects to source side)<\/td><\/tr>
      2<\/td>Lead 2<\/td>Terminal<\/td>Fuse terminal 2 (connects to load side)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Power management<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      Littelfuse<\/td>0451005.MRL<\/td>5x20mm<\/td>Same device, Littelfuse brand<\/td><\/tr>
      Bel Fuse<\/td>5ST 5-R<\/td>5x20mm<\/td>5A 250VAC slow-blow, equivalent<\/td><\/tr>
      Schurter<\/td>SPF 5.0A<\/td>5x20mm<\/td>5A 250VAC slow-blow, equivalent<\/td><\/tr>
      Bussmann<\/td>S505-5A-R<\/td>5x20mm<\/td>5A 250VAC time-lag, equivalent<\/td><\/tr>
      Eaton<\/td>BSM 5A 250V<\/td>5x20mm<\/td>5A 250VAC slow-blow, equivalent<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5647","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=5647"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5647\/revisions"}],"predecessor-version":[{"id":6093,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5647\/revisions\/6093"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5647"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5647"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}