{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451008.NR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451008.NR","canonicalUrl":"https://icboms.com/littelfuse-inc/0451008.NR","factsUrl":"https://icboms.com/api/mcp/products/0451008.NR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, 0451008.NR, 8 A fast-blow surface-mount fuse, 125 V AC/DC, 50 A breaking capacity, 2-SMD square end block package, Tape & Reel.","salesMarkdown":"## 8 A fast-blow in a 2-SMD footprint The Littelfuse 0451008.NR is an 8 A fast-blow surface-mount fuse from the NANO² 451 series, rated for 125 V AC and DC. It clears a fault in under a millisecond on a dead short — the fast-blow characteristic means it opens before downstream silicon can secondary-fail, which is the main reason to pick it over a slow-blow in a board-mount position. Breaking capacity is 50 A at the rated voltage — enough for most secondary-side DC rails and low-power AC circuits where the available fault current stays under that ceiling. The 20.23 A²s melting I²t gives the coordination engineer a number to check against the upstream protection device's let-through energy. ## Approvals and temperature envelope The 0451008.NR carries CSA, cURus, and PSE approvals — accepted in North American and Japanese equipment without a separate agency review.","metaTitle":"0451008.NR Littelfuse NANO² 451, 8A Fast Blow, 125V","metaDescription":"0451008.NR Littelfuse NANO² 451 8A fast-blow surface-mount fuse, 125V AC/DC, 50A breaking capacity. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"NANO²® 451","Package":"Tape & Reel (TR)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"20.23","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Obsolete","Approval Agency":"CSA, cURus, PSE","lifecycle_stage":"unknown","Size / Dimension":"0.240\\\" L x 0.106\\\" W x 0.106\\\" H (6.10mm x 2.69mm x 2.69mm)","DC Cold Resistance":"0.0077 Ohms","Voltage Rating - AC":"125 V","Voltage Rating - DC":"125 V","Current Rating (Amps)":"8 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5926","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b741f1b0e0a9e21e6a76cce2b8d96e45.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What approvals does the 0451008.NR carry?","answer":"The fuse is approved by CSA, cURus, and PSE, covering North American and Japanese regulatory acceptance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451008.NR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0451008.NR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}