{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451010.MR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451010.MR","canonicalUrl":"https://icboms.com/littelfuse-inc/0451010.MR","factsUrl":"https://icboms.com/api/mcp/products/0451010.MR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, 0451010.MR, 10 A, 125 V AC/DC, fast-blow SMD fuse, 2-SMD square end block package, Tape & Reel.","salesMarkdown":"## Obsolete — sourcing the 0451010.MR The 0451010.MR is listed as Obsolete by Littelfuse, meaning the manufacturer no longer produces this NANO²® 451 series fast-blow SMD fuse. ## Ratings and what they mean for your board Rated 10 A continuous at 125 V AC or DC — the fast-blow response clears overcurrents quickly, protecting downstream components in a 125 V rail. Breaking capacity is 35 A AC and 50 A DC at the rated voltage — this is the maximum fault current the fuse can safely interrupt without rupturing. For a 125 VDC circuit, a 50 A prospective short is the ceiling. Melting I²t of 26.46 A²s characterises the energy to open the element — relevant for coordinating with upstream breaker trip curves in a protection scheme. DC cold resistance of 0.0056 Ohms means the voltage drop at 10 A is about 56 mV — negligible in most low-voltage power paths. Housed in a 2-SMD square end block measuring 6.10 mm x 2.69 mm x 2.69 mm — the low profile suits dense PCB layouts where height is constrained. ## Approvals and compliance Approved by CSA, PSE, and UL — these marks certify the fuse meets North American and Japanese safety standards for overcurrent protection.","metaTitle":"0451010.MR Littelfuse NANO² 451 10A Fast-Blow SMD Fuse","metaDescription":"0451010.MR Littelfuse NANO² 451 10A fast-blow SMD fuse, 125V AC/DC, 35A/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); Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"26.46","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Obsolete","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)","DC Cold Resistance":"0.0056 Ohms","Voltage Rating - AC":"125 V","Voltage Rating - DC":"125 V","Current Rating (Amps)":"10 A","Operating Temperature":"-55°C~125°C","Breaking Capacity @ Rated Voltage":"35A AC, 50A DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.2800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/604a0e4c498aa97d2607992508357d04.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451010.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/0451010.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}}