{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L350SLWR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L350SLWR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L350SLWR","factsUrl":"https://icboms.com/api/mcp/products/1206L350SLWR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE®, LoRho series, Type Polymeric, 1206L350SLWR PTC resettable fuse, 3.5 A hold current, 50 A max current, 6 V max voltage, 1206 SMD package.","salesMarkdown":"## Active production — 3.5 A hold in a 1206 footprint The 1206L350SLWR is an active-production polymeric PTC from the POLY-FUSE LoRho series, rated for 3.5 A hold current (Ih) at 6 V max with a 50 A interrupt rating. Its 3 mOhm typical initial resistance keeps I²R losses low in the 3.5 A pass-through state — the post-trip resistance climbs to 18 mOhm max after the polymer switches, limiting fault current to a safe level. ## Trip behaviour and thermal budget At fault current the device trips in 2 seconds typical — fast enough to protect downstream components in a 6 V rail without nuisance opening on inrush. The 1206 concave package (3.25 mm × 1.65 mm, 0.75 mm thick) keeps the board footprint small, but the 3.5 A hold current means the trace width feeding it should be sized for continuous current plus the thermal rise from the PTC's own resistance. ## Approvals and compliance Carries cURus and TUV approvals, covering North American and European equipment safety requirements for a polymeric PTC in a 6 V circuit.","metaTitle":"Littelfuse 1206L350SLWR PTC Resettable Fuse, 3.5 A Hold","metaDescription":"Active Littelfuse 1206L350SLWR polymeric PTC, 3.5 A hold, 50 A max, 6 V, 1206 SMD. cURus/TUV. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Polymeric","Series":"POLY-FUSE®, LoRho","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Lead Spacing":"-","Time to Trip":"2 s","Current - Max":"50 A","Mounting Type":"Surface Mount","Voltage - Max":"6V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.030\\\" (0.75mm)","lifecycle_stage":"unknown","Size / Dimension":"0.128\\\" L x 0.065\\\" W (3.25mm x 1.65mm)","Current - Trip (It)":"7 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"3.5 A","Resistance - Initial (Ri) (Min)":"3 mOhms","Resistance - Post Trip (R1) (Max)":"18 mOhms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ba263e768b43be9aa2568c602b905b30.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the 1206L350SLWR's hold current and trip current?","answer":"Hold current (Ih) is 3.5 A maximum at 25°C; trip current (It) is 7 A. At fault current above 7 A the device trips in 2 seconds typical, resetting when power is removed and the polymer cools."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L350SLWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L350SLWR 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}}