{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206SFP400F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206SFP400F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/1206SFP400F-32-2","factsUrl":"https://icboms.com/api/mcp/products/1206SFP400F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse SFP series, board mount fuse, 1206 (3216 Metric), 4 A, 32 V DC, 50 A breaking capacity, UL approved.","salesMarkdown":"## What the 4 A rating and 50 A breaking capacity mean for your board The 1206SFP400F/32-2: Rated 4 A continuous at 32 V DC, this SFP-series fuse clears a fault up to 50 A at that voltage — the interrupting rating is the ceiling for the available fault current the fuse must safely open without arcing or rupturing the 1206 ceramic body. The cold resistance is 0.023 ohms, so at 4 A the I²R loss is under 0.4 W — negligible for the 1206 footprint, but the melting I²t of 2.74 A²s means the fuse tolerates inrush pulses (like a capacitor charge or motor start) up to that energy before the element opens. ## Obsolete — how to source this fuse today Sourced through independent surplus and broker channels. ## Package, temperature range, and compliance UL approved — the fuse carries the UL recognition mark, which certifies its interrupting rating and safe operation under the conditions listed in the UL standard for supplementary protectors.","metaTitle":"Littelfuse 1206SFP400F/32-2 SFP Fuse, 4A 32V DC","metaDescription":"Littelfuse 1206SFP400F/32-2 SFP series board-mount fuse, 4 A, 32 V DC, 50 A breaking capacity. Obsolete — sourced to order against RFQ. UL approved.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"SFP","Package":"Tape & Reel (TR) Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"2.74","Mounting Type":"Surface Mount","Response Time":"-","Package / Case":"1206 (3216 Metric)","Product Status":"Obsolete","Approval Agency":"UL","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.063\\\" W x 0.038\\\" H (3.20mm x 1.60mm x 0.97mm)","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":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the breaking capacity of this fuse at 32 V DC?","answer":"The 1206SFP400F/32-2 is rated to interrupt 50 A at 32 V DC — the maximum fault current it can safely clear without rupturing the 1206 body."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206SFP400F-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/1206SFP400F-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}}