{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451008.MRL","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451008.MRL","canonicalUrl":"https://icboms.com/littelfuse-inc/0451008.MRL","factsUrl":"https://icboms.com/api/mcp/products/0451008.MRL","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, 0451008.MRL, board-mount SMD fuse, 8 A, 125 V AC/DC, fast-blow, 50 A breaking capacity, 2-SMD square end block package, tape and reel.","salesMarkdown":"## 8 A fast-blow SMD fuse for secondary-side protection The Littelfuse 0451008.MRL is an 8 A fast-blow fuse in the NANO²® 451 series, rated for 125 V AC and DC. It clears overcurrents quickly — the fast-blow characteristic means it opens within milliseconds on a hard short, protecting downstream semiconductors and PCB traces before they heat beyond their limits. With a breaking capacity of 50 A at rated voltage, it safely interrupts fault currents up to that level without rupturing or sustaining an arc. The 20.23 melting I²t figure tells you how much energy the fuse absorbs before opening — useful for sizing it against inrush from capacitive or light inductive loads so it doesn't nuisance-blow on start-up. ## Package and process fit Housed in a 2-SMD square end block package measuring 6.10 mm x 2.69 mm x 2.69 mm, this fuse sits flat on the pad for a stable solder joint. Surface-mount assembly means it runs through the same reflow profile as the rest of the board — no hand-soldering step. Supplied in tape and reel, it feeds directly into a pick-and-place machine without a feeder change. ## Temperature range and approvals Approvals from CSA, PSE, and UL mean it is accepted in North American and Japanese equipment — no extra agency review for those markets.","metaTitle":"Littelfuse 0451008.MRL NANO² 451, 8 A Fast-Blow SMD Fuse","metaDescription":"Littelfuse 0451008.MRL NANO² 451 SMD fuse, 8 A, 125 V AC/DC, fast-blow, 50 A breaking capacity. Active production. Sourced per 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":"20.23","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Active","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":"0.0077 Ohms","Voltage Rating - AC":"125 V","Voltage Rating - DC":"125 V","Current Rating (Amps)":"8 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":[{"question":"What is the DC cold resistance of 0451008.MRL?","answer":"The DC cold resistance is 0.0077 ohms. This low value means the fuse adds negligible voltage drop in the circuit — less than 62 mV at full rated current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451008.MRL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0451008.MRL 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}}