{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0451015.NRL","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0451015.NRL","canonicalUrl":"https://icboms.com/littelfuse-inc/0451015.NRL","factsUrl":"https://icboms.com/api/mcp/products/0451015.NRL","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse NANO²® 451 series, SMD fast-blow fuse, 0451015.NRL, 15 A, 65 V AC/DC, 50 A breaking capacity, 2-SMD square end block package, tape and reel.","salesMarkdown":"## 15 A fast-blow SMD fuse for secondary-side protection The 0451015.NRL is a 15 A fast-blow surface-mount fuse from the Littelfuse NANO² 451 series, rated for 65 V AC and DC with a 50 A breaking capacity at rated voltage. Its 97.82 melting I²t and 0.0037 Ω cold resistance mean it clears a short quickly while keeping voltage drop low in normal operation — a fit for power input or DC rail protection on a board that sees up to 125 °C ambient. ## What the ratings mean for the BOM line The 15 A continuous rating at 65 V covers most low-voltage DC rails (12, 24, 48 V) and AC secondary circuits. The fast-blow response means it opens on a moderate overcurrent within milliseconds — no time-delay for inrush, so the load's start-up surge must stay below the I²t curve. Breaking capacity of 50 A at 65 V is adequate for secondary-side fault clearing in equipment fed by a limited transformer or PSU; a direct mains-fed circuit would need a higher interrupting rating. Mounts in a 2-SMD square end block footprint (6.10 mm x 2.69 mm x 2.69 mm) — the same land pattern as the NANO² 451 family. The surface-mount body suits reflow soldering; the tape-and-reel packaging (Cut Tape option available) feeds pick-and-place without a changeover. ## Approvals and compliance CSA and UL recognized — the fuse carries the agency marks that most North American and Canadian equipment standards require for secondary overcurrent protection.","metaTitle":"0451015.NRL Littelfuse NANO² 451, 15A Fast Blow, 65V SMD","metaDescription":"0451015.NRL Littelfuse NANO² 451 SMD fuse, 15A fast blow, 65V AC/DC, 50A 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":"97.82","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"2-SMD, Square End Block","Product Status":"Active","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":"$2.2800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e33e7b2503f3f5110226be89402b64a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the breaking capacity of the 0451015.NRL?","answer":"50 A at the rated 65 V AC/DC. This is the maximum fault current the fuse can safely interrupt at that voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0451015.NRL","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.NRL 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}}