{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603SFS500F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603SFS500F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/0603SFS500F-32-2","factsUrl":"https://icboms.com/api/mcp/products/0603SFS500F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. SFS Series, Board Mount (Cartridge Style Excluded) Fuse, 0603SFS500F/32-2, 5 A, 32 V DC, Slow Blow, 0603 (1608 Metric), Surface Mount.","salesMarkdown":"## 5 A at 32 V DC — obsolete, sourced per RFQ The Littelfuse 0603SFS500F/32-2 is a 5 A, 32 V DC slow-blow fuse in the SFS series, housed in a 0603 (1608 Metric) surface-mount package. Its 50 A breaking capacity at rated voltage means it safely interrupts a short-circuit fault up to that level without rupturing the package — a critical margin for secondary-side protection in DC power rails. ## Melting I²t and inrush handling With a melting I²t of 3.2, this fuse tolerates the repetitive inrush current of a capacitive input filter or a DC-DC converter startup without nuisance opening — the energy required to melt the element is high enough to ride through a typical 10–20 ms charging pulse. The 0.013 Ohm DC cold resistance keeps voltage drop under 65 mV at full rated current, which matters for low-voltage rails where every millivolt of headroom counts. ## Temperature range and UL recognition UL recognition confirms the fuse has passed the UL 248-14 standard for supplementary protectors, covering overcurrent protection in equipment where the branch circuit is already protected. ## Sourcing an obsolete SFS fuse Littelfuse lists this part as Obsolete.","metaTitle":"Littelfuse 0603SFS500F/32-2 SFS Fuse, 5 A 32 V DC, Obsolete","metaDescription":"Littelfuse 0603SFS500F/32-2 SFS series slow-blow board-mount fuse, 5 A, 32 V DC, 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) Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"3.2","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":"0.013 Ohms","Voltage Rating - DC":"32 V","Current Rating (Amps)":"5 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest alternative to the 0603SFS500F/32-2 in the SFS family?","answer":"A functional replacement would require matching the 5 A rating, 32 V DC voltage, slow-blow characteristic, and 0603 footprint — but any substitution must be validated against the actual inrush energy and breaking capacity requirements of the circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603SFS500F-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/0603SFS500F-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}}