{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206SFS300F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206SFS300F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/1206SFS300F-32-2","factsUrl":"https://icboms.com/api/mcp/products/1206SFS300F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. SFS series, Board Mount (Cartridge Style Excluded) slow-blow fuse, 1206SFS300F/32-2, 3 A, 32 VDC, 50 A breaking capacity, 1206 (3216 Metric) package, Tape & Reel.","salesMarkdown":"## Obsolete — sourcing reality for the 1206SFS300F/32-2 The Littelfuse 1206SFS300F/32-2 is listed as Obsolete by the manufacturer. This part is available through independent surplus and broker channels. ## 3 A slow blow, 32 VDC — what the ratings mean for the BOM Rated 3 A continuous at 32 VDC with a 50 A breaking capacity at that voltage — the fuse clears a fault up to 50 A without rupturing the 1206 ceramic body. Below that threshold it opens safely; above it the arc may not extinguish inside the package. Slow-blow response means the element absorbs inrush current pulses without nuisance opening — a 1.2 A²s melting I²t gives roughly 0.13 seconds to open at 3 A, scaling inversely with the square of the fault current. This suits capacitive input loads or motor start-up where the peak exceeds the steady-state rating for tens of milliseconds. DC cold resistance is 0.034 ohms — at 3 A the self-heating I²R loss is 0.3 W, negligible in still air but worth a check if the fuse is packed between heat-sinking traces on a dense board. ## UL recognized, 1206 SMD — board-fit and compliance UL recognized — the fuse carries UL listing for the 3 A / 32 VDC / 50 A interrupting rating, which is the primary acceptance mark for North American equipment. The 0.97 mm height clears most conformal-coat thicknesses and under-fill gaps. Tape & Reel packaging suits automated pick-and-place.","metaTitle":"Littelfuse 1206SFS300F/32-2 SFS Fuse, 3 A, 32 VDC, Slow Blow","metaDescription":"Littelfuse 1206SFS300F/32-2 SFS series slow-blow fuse, 3 A at 32 VDC, 50 A breaking capacity, 1206 SMD.","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":"1.2","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":"0.034 Ohms","Voltage Rating - DC":"32 V","Current Rating (Amps)":"3 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the 1206SFS300F/32-2?","answer":"A functionally equivalent 3 A slow-blow 1206 fuse from the same SFS family or a competitor's 1206 SMD fuse may fit the same pad layout, but the interrupting rating, I²t, and cold resistance must be verified against the circuit requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206SFS300F-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/1206SFS300F-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}}