{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603SFV400F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603SFV400F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/0603SFV400F-32-2","factsUrl":"https://icboms.com/api/mcp/products/0603SFV400F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse SFV series, board-mount fast-blow fuse, 0603 (1608 metric), 4 A, 32 V DC, 35 A breaking capacity, UL recognized, Tape & Reel.","salesMarkdown":"## Obsolete — sourcing through independent channels Littelfuse has marked the 0603SFV400F/32-2 as obsolete. Availability and current pricing are quoted to order. ## 4 A fast-blow in a 0603 footprint — what the ratings mean for fit Rated 4 A at 32 V DC with a fast-blow response. The 35 A breaking capacity at rated voltage means the fuse can safely interrupt a fault current up to 35 A without rupturing — adequate for low-voltage DC rails where the prospective short-circuit current stays below that ceiling. Melting I²t of 1.15 and a DC cold resistance of 0.023 Ohms define the inrush energy the fuse absorbs before opening. A downstream capacitor bank that draws a surge above this I²t will nuisance-blow the fuse — pre-charge or a slow-blow alternative may be needed. The 0603 (1608 metric) package is a standard surface-mount footprint. ## UL recognition and compliance documentation The fuse carries UL recognition, which certifies the device meets UL 248-14 for supplemental overcurrent protection. RoHS and REACH compliance documentation is available from Littelfuse upon request.","metaTitle":"0603SFV400F/32-2 Littelfuse SFV 4A 32V Fast-Blow Fuse","metaDescription":"0603SFV400F/32-2 Littelfuse SFV series 4A 32V fast-blow surface-mount fuse, UL recognized, obsolete.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"SFV","Package":"Tape & Reel (TR)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"1.15","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 0.031\\\" W x 0.014\\\" H (1.60mm x 0.80mm x 0.35mm)","DC Cold Resistance":"0.023 Ohms","Voltage Rating - DC":"32 V","Current Rating (Amps)":"4 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"35A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3012","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/04bd98ad2cdad65c16cf9b80561f8e01.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 0603SFV400F/32-2?","answer":"A functional replacement would require evaluating other 0603 fast-blow fuses with similar 4 A, 32 V DC ratings and I²t characteristics — but a board spin or requalification may be needed."},{"question":"Where can I buy 0603SFV400F/32-2?","answer":"This obsolete part is available through independent distribution. Submit an RFQ for your target quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603SFV400F-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/0603SFV400F-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}}