{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451015.MR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451015.MR","canonicalUrl":"https://icboms.com/littelfuse-inc/0451015.MR","factsUrl":"https://icboms.com/api/mcp/products/0451015.MR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 Series, Board Mount SMD Fuse, Fast Blow, 15 A, 65 V AC/DC, 50 A Breaking Capacity, 2-SMD Square End Block Package, Tape & Reel.","salesMarkdown":"## Obsolete NANO² 451 SMD Fuse — Sourcing Reality The 0451015.MR is a Littelfuse NANO²® 451 series surface-mount fast-blow fuse rated 15 A at 65 V AC/DC with a breaking capacity of 50 A at rated voltage. It is now classified as Obsolete by the manufacturer. ## Parametric Profile and Board Fit The fuse measures 6.10 mm x 2.69 mm x 2.69 mm in a 2-SMD square end block package, surface-mount only. The DC cold resistance is 0.0037 Ohms, and the melting I²t is 97.82 — useful for coordination with downstream components. Approvals include CSA and UL, covering North American regulatory acceptance.","metaTitle":"0451015.MR Littelfuse NANO² 451 15A Fast Blow SMD Fuse","metaDescription":"0451015.MR Littelfuse NANO² 451 SMD fuse, 15 A, 65 V AC/DC, Fast Blow, 50 A breaking capacity.","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":"97.82","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Obsolete","Approval Agency":"CSA, 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)","DC Cold Resistance":"0.0037 Ohms","Voltage Rating - AC":"65 V","Voltage Rating - DC":"65 V","Current Rating (Amps)":"15 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.3800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e33e7b2503f3f5110226be89402b64a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/0451015.MR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 0451015.MR?","answer":"No official pin-compatible successor or cross-reference is recorded from Littelfuse for the 0451015.MR. A functional replacement would require reviewing the same NANO² 451 series ratings or a different package — a board spin may be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451015.MR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0451015.MR 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}}