{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L020YR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L020YR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L020YR","factsUrl":"https://icboms.com/api/mcp/products/1206L020YR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE® 1206L series, polymeric PTC resettable fuse, 1206L020YR, 200 mA hold, 420 mA trip, 24 V, 100 A max, AEC-Q200, surface mount 1206.","salesMarkdown":"## Hold current and trip threshold The 1206L020YR is a polymeric PTC resettable fuse from Littelfuse's POLY-FUSE 1206L series. It holds 200 mA continuously without tripping — below that current the resistance stays low, under 650 mOhms initial. Once the load exceeds 420 mA trip current, the PTC heats up and its resistance jumps to a maximum of 2.6 ohms post-trip, limiting the fault current. The trip happens in 100 ms typical at 25°C — fast enough to protect a USB port or a low-voltage DC rail from a sustained overcurrent or short. The part resets automatically when power is removed and the PTC cools, so no fuse replacement is needed after a fault clears. ## Fault current and voltage ceiling Rated for a maximum fault current of 100 A at 24 V — the PTC can interrupt a hard short up to that level without rupturing. The 24 V max voltage limits it to low-voltage DC circuits: USB 5 V, 12 V automotive auxiliary, or 24 V industrial sensor rails. Do not use on 48 V or mains AC without a series current-limiting element. The 1206 footprint (3.20 mm x 1.65 mm, concave termination) is standard for reflow assembly. ## Automotive qualification and approvals AEC-Q200 qualified — this PTC meets the passive-component stress test sequence for automotive electronics: temperature cycling, moisture resistance, mechanical shock, and solder heat. ## Production status and sourcing Littelfuse lists the 1206L020YR as Active — no discontinuation notice or last-time-buy window has been issued.","metaTitle":"1206L020YR Littelfuse PTC Resettable Fuse, 200 mA, 24 V","metaDescription":"Littelfuse 1206L020YR polymeric PTC resettable fuse, 200 mA hold current, 24 V max, 100 A interrupt, AEC-Q200. 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); Cut Tape (CT)","Ratings":"AEC-Q200","Lead Spacing":"-","Time to Trip":"100 ms","Current - Max":"100 A","Mounting Type":"Surface Mount","Voltage - Max":"24V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.039\\\" (1.00mm)","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.065\\\" W (3.20mm x 1.65mm)","Current - Trip (It)":"420 mA","Height - Seated (Max)":"-","Operating Temperature":"-40°C~85°C","Current - Hold (Ih) (Max)":"200 mA","Resistance - Initial (Ri) (Min)":"650 mOhms","Resistance - Post Trip (R1) (Max)":"2.6 Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cd6794590906b9a34104657bec909382.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy 1206L020YR and how is it quoted?","answer":"The 1206L020YR is sourced through authorized and independent distribution."},{"question":"What compliance documentation does Littelfuse provide for 1206L020YR?","answer":"The part carries cURus and TUV safety approvals. AEC-Q200 qualification documentation is available from Littelfuse."},{"question":"What is the hold and trip current of 1206L020YR?","answer":"Hold current is 200 mA maximum; trip current is 420 mA. Below 200 mA the PTC stays low resistance; above 420 mA it trips in 100 ms typical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L020YR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L020YR 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}}