{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603SFS300F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603SFS300F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/0603SFS300F-32-2","factsUrl":"https://icboms.com/api/mcp/products/0603SFS300F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. SFS series board-mount slow-blow fuse, 0603 (1608 metric), 3 A, 32 VDC, 50 A breaking capacity, UL approved, tape and reel.","salesMarkdown":"## What the ratings mean for your protection design The 0603SFS300F/32-2 is a Littelfuse SFS series slow-blow fuse in a 0603 (1608 metric) surface-mount package, rated 3 A at 32 VDC with a 50 A breaking capacity at rated voltage. The slow-blow response time means it tolerates high inrush current pulses without nuisance opening — the 0.87 melting I²t tells you the energy needed to clear it, so you can check whether your circuit's worst-case surge stays below that threshold. The 0.031 ohm DC cold resistance is low enough that self-heating at 3 A is manageable, but you still need to derate for ambient temperature above 25 °C. UL approval means the fuse has passed UL 248-14 testing for branch-circuit protection — a requirement for many North American OEM panels and end-equipment listings. Littelfuse has marked the 0603SFS300F/32-2 as obsolete. No stock-holding claim is made; availability is verified per inquiry. The 0603 (1608 metric) footprint is standard — 1.60 mm x 0.80 mm with a 0.80 mm seated height. The tape-and-reel packaging is compatible with standard pick-and-place assembly. The fuse is a two-terminal chip, so layout is straightforward: the pad geometry follows the Littelfuse recommended land pattern in the SFS series datasheet, with a 0.50 mm gap between the two pads.","metaTitle":"Littelfuse 0603SFS300F/32-2 SFS Fuse, 3A 32V Slow Blow","metaDescription":"Littelfuse 0603SFS300F/32-2 SFS series board-mount fuse, 3A, 32VDC, slow blow, 50A breaking capacity, UL approved. 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) Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"0.87","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":"0.031 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":"$0.8300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the breaking capacity of the 0603SFS300F/32-2?","answer":"50 A at the rated 32 VDC. This means the fuse can safely interrupt a fault current up to 50 A without rupturing or sustaining an arc — critical for DC circuits where the available short-circuit current from the source must stay below this limit."},{"question":"What is the melting I²t value and why does it matter?","answer":"The melting I²t is 0.87. This is the energy required to open the fuse element; you compare it against the I²t of the inrush pulse your circuit produces. If the pulse I²t exceeds 0.87, the fuse may open prematurely — the slow-blow characteristic gives margin, but the I²t is the quantitative check."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603SFS300F-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/0603SFS300F-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}}