{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451010.NR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451010.NR","canonicalUrl":"https://icboms.com/littelfuse-inc/0451010.NR","factsUrl":"https://icboms.com/api/mcp/products/0451010.NR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. NANO²® 451 series, 0451010.NR, board-mount fast-blow SMD fuse, 10 A, 125 V AC/DC, 35 A AC / 50 A DC breaking capacity, 2-SMD square end block package, Tape & Reel.","salesMarkdown":"## Key ratings and what they drive The 0451010.NR: Rated 10 A continuous at 125 V AC or DC — this fuse sits in a secondary-side DC rail or low-voltage AC branch where the supply is under 125 V. The fast-blow response time means it clears on short-duration overcurrents, so it suits circuits with minimal inrush (e.g., control logic, sensor power, or signal conditioning). Breaking capacity is 35 A AC and 50 A DC at the rated voltage — the fuse can interrupt a fault current up to those levels without rupturing the package. For a 10 A rail, a short-circuit current above 50 A DC would require an upstream current-limiting device to keep the fault within the fuse's interrupt rating. Melting I²t is 26.46 A²s — this value governs the fuse's ability to ride through brief current pulses. A downstream capacitor bank or motor start that draws a surge exceeding this I²t threshold will open the fuse, so the pulse energy must be budgeted against this figure during design. This is negligible for most PCB layouts but should be accounted for in a low-voltage rail where every millivolt of drop matters. ## Package and board-fit Housed in a 2-SMD square end block package measuring 6.10 mm x 2.69 mm x 2.69 mm — the compact footprint fits dense PCB layouts where a through-hole fuse would consume too much board area. Surface-mount assembly aligns with reflow soldering processes; the Tape & Reel packaging supports automated pick-and-place. ## Approvals and temperature range Approved by CSA, PSE, and UL — the fuse carries the certifications needed for equipment sold into North American and Japanese markets.","metaTitle":"0451010.NR Littelfuse NANO² 451 10A Fast Blow SMD Fuse","metaDescription":"Littelfuse 0451010.NR 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)","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/2e33e7b2503f3f5110226be89402b64a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 0451010.NR?","answer":"0451010.NR is obsolete but available through independent distribution."},{"question":"What is the breaking capacity of 0451010.NR?","answer":"The breaking capacity is 35 A AC and 50 A DC at the rated voltage of 125 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451010.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/0451010.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}}