{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451.750MR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451.750MR","canonicalUrl":"https://icboms.com/littelfuse-inc/0451.750MR","factsUrl":"https://icboms.com/api/mcp/products/0451.750MR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, Board Mount (Cartridge Style Excluded), Surface Mount, 2-SMD Square End Block, 750 mA, 125 V AC/DC, Fast Blow, 50 A breaking capacity, 0.185 I²t, 0.245 Ohms DC resistance, Tape & Reel.","salesMarkdown":"## NANO²® 451 — 750 mA fast-blow fuse, now obsolete The Littelfuse 0451.750MR is a 750 mA fast-blow surface-mount fuse from the NANO²® 451 series, rated for 125 V AC and DC with a 50 A breaking capacity at rated voltage. Its 0.185 melting I²t and 0.245 Ohm cold resistance make it suitable for protecting sensitive board-level circuits where fast opening is required. The part is now classified as obsolete by Littelfuse, meaning no ongoing production — sourcing is through surplus or broker channels. Housed in a 2-SMD square end block package measuring 0.240\" x 0.106\" x 0.106\" (6.10 mm x 2.69 mm x 2.69 mm), it is a surface-mount fuse designed for reflow soldering onto standard PCB pads. ## Compliance and approvals Approved by CSA and UL, the 0451.750MR carries the typical safety certifications for a board-mount fuse used in North American and Canadian equipment.","metaTitle":"Littelfuse 0451.750MR NANO²® 451 Fuse, 750 mA, 125 V","metaDescription":"Littelfuse 0451.750MR NANO²® 451 surface-mount fuse, 750 mA, 125 V AC/DC, fast blow. Obsolete — sourced to order. Request a quote.","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":"0.185","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":"0.245 Ohms","Voltage Rating - AC":"125 V","Voltage Rating - DC":"125 V","Current Rating (Amps)":"750 mA","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":[{"question":"How can I get pricing and availability for the 0451.750MR?","answer":"Submit an RFQ through the storefront. We source the part through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451.750MR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0451.750MR 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}}