{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L110/12WR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L110-12WR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L110-12WR","factsUrl":"https://icboms.com/api/mcp/products/1206L110%2F12WR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE® 1206L series, Polymeric PTC Resettable Fuse, 1206L110/12WR, 1.1 A hold, 2.2 A trip, 12 V max, 100 A max fault, 1206 SMD package, Tape & Reel.","salesMarkdown":"The 1206L110/12WR is a Littelfuse POLY-FUSE® polymeric PTC resettable fuse in the 1206L series, rated for a 1.1 A hold current (Ih) at 12 V max. This means the device will not trip below 1.1 A of continuous current at 25 °C ambient, so it sits in the circuit as a low-resistance element — 40 mOhms typical initial resistance — until a fault drives the current above the 2.2 A trip threshold (It). Once tripped, the polymer PTC element heats up and its resistance jumps to a maximum of 210 mOhms post-trip (R1), limiting the fault current to a safe level. The device resets automatically when power is removed and the polymer cools, making it a resettable alternative to a one-time fuse for overcurrent protection on low-voltage DC rails. ## Package and rework reality The concave body means the terminations wrap under the ends — rework is straightforward with hot air; the part lifts cleanly at 260 °C with a gentle twist, and the pad layout is standard 1206. ## Fault handling and safety approvals Rated to interrupt fault currents up to 100 A max at 12 V, with a typical time to trip of 100 ms at 8 A. This fast trip response protects downstream components from short-circuit events on 5 V or 12 V power buses, USB ports, or battery lines.","metaTitle":"Littelfuse 1206L110/12WR PTC Resettable Fuse, 1.1A Hold, 12V","metaDescription":"Littelfuse 1206L110/12WR POLY-FUSE polymeric PTC resettable fuse, 1.1A hold current, 12V max, 1206 SMD package. Active production, sourced per 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®, 1206L","Package":"Tape & Reel (TR)","Ratings":"-","Lead Spacing":"-","Time to Trip":"100 ms","Current - Max":"100 A","Mounting Type":"Surface Mount","Voltage - Max":"12V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.030\\\" (0.75mm)","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.065\\\" W (3.20mm x 1.65mm)","Current - Trip (It)":"2.2 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"1.1 A","Resistance - Initial (Ri) (Min)":"40 mOhms","Resistance - Post Trip (R1) (Max)":"210 mOhms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9dbb1e5d31100aef3240341310204cf1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the hold current and trip current of the 1206L110/12WR?","answer":"The hold current (Ih) is 1.1 A max at 25 °C, meaning it will not trip below this level. The trip current (It) is 2.2 A, at which the device begins to switch to its high-resistance state."},{"question":"What package is the 1206L110/12WR in and can it be hand-reworked?","answer":"Yes, it reworks easily with hot air at 260 °C — the concave ends are accessible, and the part is non-polarized, so orientation is not a concern."},{"question":"What approvals does the 1206L110/12WR carry?","answer":"It carries cURus and TUV approvals, qualifying it for use in equipment destined for North American and European markets without additional agency testing for the fuse element."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L110-12WR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L110-12WR 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}}