{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"046703.5NR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"046703.5NR","canonicalUrl":"https://icboms.com/littelfuse-inc/046703.5NR","factsUrl":"https://icboms.com/api/mcp/products/046703.5NR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse 467 Series, Board Mount SMD Fuse, 046703.5NR, 3.5 A, 32 V AC/DC, Fast Blow, 0603 (1608 Metric), 35 A Breaking Capacity.","salesMarkdown":"## 3.5 A fast-blow in a 0603 footprint The Littelfuse 046703.5NR is a 3.5 A fast-blow SMD fuse from the 467 series, housed in a 0603 (1608 metric) package. Rated 32 V AC/DC with a 35 A interrupting capacity at that voltage, it clears overcurrent faults quickly on low-voltage board-level circuits — think secondary protection on a 24 VDC supply rail or a 12 V automotive line where a short could otherwise take out the trace or the load. ## Breaking capacity and I²t coordination The 35 A breaking capacity at 32 V means the fuse safely interrupts a fault current up to that level without rupturing the ceramic body — critical for safety agency compliance (UL and CSA listed per). Below that threshold the fuse element vaporises cleanly; above it the arc may not extinguish, so the available fault current of the supply must stay under 35 A. Melting I²t is 0.4306 — this is the energy required to open the fuse element. Designers use this figure to coordinate with downstream semiconductor surge ratings (e.g., a TVS diode or a MOSFET's I²t capability). The fast-blow response means it opens on sustained overcurrent rather than tolerating brief inrush — so it is a poor fit for motor-start or capacitive-load circuits unless the inrush energy stays below the I²t threshold. ## Package and PCB integration Surface-mount 0603 package (1.60 mm x 0.81 mm x 0.31 mm) — footprint compatible with standard reflow soldering profiles. The 0603 size suits dense PCB layouts where a larger 1206 or through-hole fuse would crowd the routing channel.","metaTitle":"Littelfuse 046703.5NR 467 Series Fuse, 3.5 A, 32 V","metaDescription":"Littelfuse 046703.5NR 3.5 A fast-blow SMD fuse, 32 V AC/DC, 35 A breaking capacity, 0603 package. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Color":"-","Series":"467","Package":"Tape & Reel (TR); Cut Tape (CT)","Fuse Type":"Board Mount (Cartridge Style Excluded)","Melting I²t":"0.4306","Mounting Type":"Surface Mount","Response Time":"Fast Blow","Package / Case":"0603 (1608 Metric)","Product Status":"Active","Approval Agency":"CSA, UL","lifecycle_stage":"unknown","Size / Dimension":"0.063\\\" L x 0.032\\\" W x 0.012\\\" H (1.60mm x 0.81mm x 0.31mm)","DC Cold Resistance":"0.0139 Ohms","Voltage Rating - AC":"32 V","Voltage Rating - DC":"32 V","Current Rating (Amps)":"3.5 A","Operating Temperature":"-55°C~90°C","Breaking Capacity @ Rated Voltage":"35A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/649812335218789f332d0f5127374e6a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for 046703.5NR?","answer":"The 046703.5NR is sourced to order against your BOM quantity through independent distribution."},{"question":"What approvals does the 046703.5NR carry?","answer":"The fuse is CSA and UL approved — accepted for North American and Canadian regulatory compliance. This simplifies OEM certification for equipment sold in those markets."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/046703.5NR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/046703.5NR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}