{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603SFS450F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603SFS450F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/0603SFS450F-32-2","factsUrl":"https://icboms.com/api/mcp/products/0603SFS450F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. SFS series, Board Mount Slow Blow Fuse, 0603 (1608 Metric), 4.5 A, 32 VDC, 50 A breaking capacity, Tape & Reel.","salesMarkdown":"## What the 4.5 A rating and 50 A breaking capacity mean for your board The Littelfuse 0603SFS450F/32-2 is a 4.5 A, 32 VDC slow-blow fuse in the 0603 (1608 Metric) surface-mount package, part of the SFS series. The slow-blow response time means it tolerates inrush currents — from a capacitor bank or motor start — without nuisance opening, while the 50 A interrupting rating at 32 VDC ensures it clears a hard short safely without arcing across the element. ## Melting I²t and cold resistance — sizing the fuse to the load With a melting I²t of 2.7, this fuse handles repetitive surge pulses up to that energy integral before the element fatigues — a key parameter for circuits with periodic capacitor charging or motor starts. ## Obsolete — sourcing reality for this SFS series fuse The 0603SFS450F/32-2 is marked obsolete by Littelfuse. The UL approval means the fuse carries the same agency certification as the active SFS family, so a replacement from the same series with matching ratings is a straightforward swap if the board layout allows.","metaTitle":"Littelfuse 0603SFS450F/32-2 SFS Fuse, 4.5A 32V","metaDescription":"Littelfuse 0603SFS450F/32-2 SFS series slow-blow fuse, 4.5 A at 32 VDC, 50 A breaking capacity, 0603 package. 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":"SFS","Package":"Tape & Reel (TR)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"2.7","Mounting Type":"Surface Mount","Response Time":"Slow 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 0.031\\\" H (1.60mm x 0.80mm x 0.80mm)","DC Cold Resistance":"0.015 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":"$0.9400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I get pricing and availability for 0603SFS450F/32-2?","answer":"Submit an RFQ through this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603SFS450F-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/0603SFS450F-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}}