{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603SFP350F/32-2","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603SFP350F-32-2","canonicalUrl":"https://icboms.com/littelfuse-inc/0603SFP350F-32-2","factsUrl":"https://icboms.com/api/mcp/products/0603SFP350F%2F32-2","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse SFP series board-mount fuse, 0603SFP350F/32-2, 3.5 A, 32 VDC, 50 A breaking capacity, 0603 (1608 metric) surface-mount package, Tape & Reel.","salesMarkdown":"## Obsolete — sourcing through independent channels The 0603SFP350F/32-2 is listed as obsolete by Littelfuse, meaning the manufacturer no longer produces it. A board-spin or parametric substitute evaluation is required if a direct drop-in is not found in the surplus channel. ## Protection profile — 3.5 A, 32 VDC, 50 A interrupt Rated 3.5 A continuous at 32 VDC, this SFP-series fuse opens a fault circuit with a breaking capacity of 50 A at the rated voltage — sufficient for low-voltage DC rails where the prospective short-circuit current stays under that ceiling. The melting I²t of 1.1 A²s defines the energy let-through before the element clears. This figure is the key coordination parameter: downstream semiconductors or PCB traces must survive the I²t pulse without damage, so the fuse's 1.1 I²t sets the minimum withstand requirement for the protected components. DC cold resistance measures 0.022 Ohms. At 3.5 A the voltage drop is roughly 77 mV, and the I²R self-heating at rated current is about 0.27 W — negligible in free air but worth derating in a densely populated 0603 layout. ## 0603 footprint and board integration Housed in the standard 0603 (1608 metric) surface-mount package — 1.60 mm x 0.81 mm x 0.81 mm — the fuse occupies the same land pattern as a chip resistor or capacitor of the same size. The reflow profile follows the solder paste supplier's recommendation for the pad geometry; no special handling beyond standard SMT assembly is required. The operating temperature range spans -55°C to 125°C, covering industrial and military-temperature environments. The fuse's current-carrying capacity derates above 25°C ambient; the datasheet's derating curve should be consulted for the actual trip threshold at the application's maximum ambient.","metaTitle":"0603SFP350F/32-2 Littelfuse SFP 3.5A 32V Fuse, Obsolete","metaDescription":"0603SFP350F/32-2 Littelfuse SFP series board-mount fuse, 3.5 A, 32 VDC, 50 A breaking capacity, 0603 package. Obsolete — sourced to order, RFQ for availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"SFP","Package":"Tape & Reel (TR)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"1.1","Mounting Type":"Surface Mount","Package / Case":"0603 (1608 Metric)","Product Status":"Obsolete","Approval Agency":"-","lifecycle_stage":"unknown","Size / Dimension":"0.063\\\" L x 0.032\\\" W x 0.032\\\" H (1.60mm x 0.81mm x 0.81mm)","DC Cold Resistance":"0.022 Ohms","Voltage Rating - DC":"32 V","Current Rating (Amps)":"3.5 A","Operating Temperature":"-55°C ~ 125°C","Breaking Capacity @ Rated Voltage":"50A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4998","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8939cf38a5e3035b0d6c6bedcc1d525b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for 0603SFP350F/32-2?","answer":"Pricing and stock are confirmed at quote time against your BOM quantity. Submit an RFQ through the storefront; the sourcing desk will check independent distribution, surplus inventory, and broker networks for the exact order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603SFP350F-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/0603SFP350F-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}}