{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206SFS450F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206SFS450F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/1206SFS450F-32-2","factsUrl":"https://icboms.com/api/mcp/products/1206SFS450F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse SFS series, board mount slow-blow fuse, 1206 (3216 Metric) package, 4.5 A, 32 VDC, 50 A breaking capacity, UL recognized, Tape & Reel.","salesMarkdown":"## 4.5 A slow-blow in a 1206 footprint The Littelfuse 1206SFS450F/32-2 is a 4.5 A surface-mount slow-blow fuse from the SFS series, rated for 32 VDC with a 50 A interrupting capacity at that voltage. The slow-blow characteristic means it tolerates brief inrush current pulses without nuisance opening — the 3.6 A²s melting I²t gives a quantitative handle on how much energy the element absorbs before clearing. ## What the ratings mean for the board Rated 4.5 A continuous at 32 VDC — the 50 A breaking capacity means it safely interrupts a fault current up to that level without rupturing the 1206 ceramic body, which is the key safety spec for a secondary-side DC rail fuse. ## Obsolete — sourcing through surplus channels The UL recognition carries over to any genuine Littelfuse stock, so the safety certification holds for the sourced part.","metaTitle":"Littelfuse 1206SFS450F/32-2 SFS Fuse, 4.5 A, 32 VDC","metaDescription":"Littelfuse 1206SFS450F/32-2 SFS series surface-mount slow-blow fuse, 4.5 A at 32 VDC, 50 A breaking capacity, UL recognized.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"SFS","Package":"Tape & Reel (TR) Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"3.6","Mounting Type":"Surface Mount","Response Time":"Slow Blow","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":"0.02 Ohms","Voltage Rating - DC":"32 V","Current Rating (Amps)":"4.5 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the 1206SFS450F/32-2 or check stock?","answer":"Current pricing and available quantities are confirmed at quote time — submit an RFQ for your BOM quantity."},{"question":"What does the 3.6 A²s melting I²t mean for my circuit?","answer":"The 3.6 A²s I²t is the energy needed to melt the fuse element. A slow-blow fuse with this I²t can pass a capacitor charging inrush or a motor start surge that lasts a few milliseconds without opening — the energy in the pulse stays below the fuse's thermal clearing threshold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206SFS450F-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/1206SFS450F-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}}