{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451005.NRL","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451005.NRL","canonicalUrl":"https://icboms.com/littelfuse-inc/0451005.NRL","factsUrl":"https://icboms.com/api/mcp/products/0451005.NRL","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, surface-mount fast-blow fuse, 0451005.NRL, 5 A, 125 V AC/DC, 50 A breaking capacity, 2-SMD square end block package, Tape & Reel.","salesMarkdown":"## 5 A fast-blow SMT fuse for board-level protection The Littelfuse 0451005.NRL is a 5 A fast-blow surface-mount fuse from the NANO²® 451 series, rated for 125 V AC and DC with a 50 A interrupting capacity at rated voltage. Housed in a compact 2-SMD square end block package (6.10 mm x 2.69 mm x 2.69 mm), it is designed for automated pick-and-place assembly on densely populated PCBs. ## Breaking capacity and let-through energy for coordination With a 50 A breaking capacity at 125 V, this fuse safely interrupts overcurrents up to that level — adequate for secondary-side DC rail faults in most power supplies and battery circuits. A melting I²t of 5.566 provides the let-through energy figure needed for selectivity studies and to ensure downstream components are not stressed beyond their surge ratings. ## Active lifecycle and compliance coverage Approvals from CSA, PSE, and UR cover North American and Japanese regulatory requirements — a compliance short-cut for OEMs shipping finished goods into those markets.","metaTitle":"Littelfuse 0451005.NRL NANO² 451 SMT Fuse, 5 A, 125 V","metaDescription":"0451005.NRL Littelfuse NANO² 451 surface-mount fuse, 5 A, 125 V AC/DC, fast blow, 50 A breaking capacity. Active production. CSA/PSE/UR approved. Order via RFQ.","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":"5.566","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Active","Approval Agency":"CSA, PSE, UR","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":"0.0125 Ohms","Voltage Rating - AC":"125 V","Voltage Rating - DC":"125 V","Current Rating (Amps)":"5 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e33e7b2503f3f5110226be89402b64a.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451005.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/0451005.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}}