{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451001.NRL","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451001.NRL","canonicalUrl":"https://icboms.com/littelfuse-inc/0451001.NRL","factsUrl":"https://icboms.com/api/mcp/products/0451001.NRL","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, board mount surface-mount fuse, 0451001.NRL, 1 A, 125 V AC/DC, fast blow, 50 A breaking capacity, 2-SMD square end block, tape and reel.","salesMarkdown":"## Fast-blow 1 A in a compact SMD footprint The 0451001.NRL is a Littelfuse NANO² 451 series surface-mount fuse rated 1 A with a fast-blow response, suitable for protecting sensitive circuits where overcurrent must be cleared quickly without thermal inertia. Rated for 125 V AC and DC, this fuse provides consistent protection across both supply types, and its 50 A breaking capacity at rated voltage means it can safely interrupt a fault current up to that level without rupturing the package. ## Melting I²t and temperature envelope A melting I²t of 0.459 A²s gives the energy needed to open the fuse — useful for coordinating with downstream semiconductor protection or predicting inrush-handling capability.","metaTitle":"0451001.NRL Littelfuse NANO² 451, 1A Fast Blow, 125V","metaDescription":"Littelfuse 0451001.NRL NANO² 451 surface-mount fuse, 1A fast blow, 125V AC/DC, 50A breaking capacity. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"NANO²® 451","Package":"Tape & Reel (TR) Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"0.459","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Active","Approval Agency":"CSA, PSE, UL","lifecycle_stage":"unknown","Size / Dimension":"0.240\\\" L x 0.106\\\" W x 0.106\\\" H (6.10mm x 2.69mm x 2.69mm)","Voltage Rating - AC":"125 V","Voltage Rating - DC":"125 V","Current Rating (Amps)":"1 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e33e7b2503f3f5110226be89402b64a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/0451001.NRL/alternatives.json"},"ai":{"faq":[{"question":"What approvals does 0451001.NRL carry?","answer":"It is approved by CSA, PSE, and UL — those marks cover North American and Japanese safety standards for overcurrent protection devices."},{"question":"What package does 0451001.NRL come in?","answer":"It is supplied in a 2-SMD square end block package, 6.10 mm x 2.69 mm x 2.69 mm, on tape and reel (cut tape available). Surface-mount reflow compatible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451001.NRL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0451001.NRL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}