{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603SFF250FM/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603SFF250FM-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/0603SFF250FM-32-2","factsUrl":"https://icboms.com/api/mcp/products/0603SFF250FM%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse SFF series, Board Mount Fast Blow Fuse, 0603 (1608 Metric) package, 2.5 A, 32 V DC, 35 A breaking capacity, UL recognized, Tape & Reel.","salesMarkdown":"The Littelfuse 0603SFF250FM/32-2 is a 2.5 A fast-blow surface-mount fuse in the SFF series, rated for 32 V DC with a 35 A breaking capacity at that voltage — meaning it safely interrupts a fault current up to 35 A without rupturing the 0603 ceramic body. The 0.115 melting I²t figure tells you how much energy the fuse element absorbs before opening — a key parameter for coordinating with downstream components and verifying the fuse holds through the inrush pulse of a capacitive input or a DC-DC converter start-up. ## Package, mounting, and thermal envelope Housed in a standard 0603 (1608 metric) footprint, this fuse is intended for reflow soldering onto a PCB — the 0.032 Ohm cold resistance means the voltage drop at 2.5 A is about 80 mV, negligible for most low-voltage rails but worth checking if the load is sensitive to supply droop. ## Lifecycle reality and sourcing posture No pin-compatible drop-in replacement is documented by Littelfuse, so a board spin or a parametric search for a 2.5 A fast-blow 0603 fuse with UL recognition is the practical next step for new designs.","metaTitle":"0603SFF250FM/32-2 Littelfuse SFF 2.5A Fast Blow Fuse, 32V","metaDescription":"0603SFF250FM/32-2 Littelfuse SFF series 2.5A fast-blow fuse, 32V DC, 35A breaking capacity, UL recognized. 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":"SFF","Package":"Tape & Reel (TR)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"0.115","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"0603 (1608 Metric)","Product Status":"Obsolete","Approval Agency":"UL","lifecycle_stage":"unknown","Size / Dimension":"0.063\\\" L x 0.032\\\" W x 0.037\\\" H (1.60mm x 0.80mm x 0.95mm)","DC Cold Resistance":"0.032 Ohms","Voltage Rating - DC":"32 V","Current Rating (Amps)":"2.5 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"35A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What are the key ratings for the 0603SFF250FM/32-2?","answer":"This is a 2.5 A fast-blow fuse rated for 32 V DC with a 35 A breaking capacity at rated voltage. The melting I²t is 0.115 and the DC cold resistance is 0.032 Ohms."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603SFF250FM-32-2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603SFF250FM-32-2 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}}