{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L035/15YR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L035-15YR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L035-15YR","factsUrl":"https://icboms.com/api/mcp/products/1206L035%2F15YR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE®, 1206L series PTC resettable fuse, 1206L035/15YR, 350 mA hold, 15 V, 100 A max, 1206 concave surface-mount.","salesMarkdown":"## PTC resettable fuse for low-voltage board protection The Littelfuse 1206L035/15YR is a polymeric PTC resettable fuse from the POLY-FUSE® 1206L series, designed to protect low-voltage circuits by tripping when current exceeds the hold threshold and automatically resetting after the fault clears. Rated for a maximum voltage of 15 V and a maximum fault current of 100 A, this part is suited for USB ports, battery packs, and other 5–12 V DC power rails where a resettable overcurrent device is preferred over a one-time fuse. ## Hold current, trip current, and time to trip The hold current (Ih) is 350 mA maximum at 25 °C — the device will not trip below this steady-state current. The trip current (It) is 750 mA, meaning the PTC begins to switch to a high-resistance state when the load exceeds roughly double the hold rating. Typical time to trip at 25 °C is 100 ms, fast enough to protect against short circuits without nuisance tripping on inrush from a capacitive load. After tripping, the post-trip resistance (R1) rises to a maximum of 1.2 Ω, limiting fault current; initial resistance (Ri) is a minimum of 300 mΩ, keeping voltage drop low during normal operation. The 1206L035/15YR is listed as Obsolete by Littelfuse, meaning the manufacturer no longer produces it. Sourcing is through independent distribution channels; availability and pricing are confirmed at the time of RFQ against your BOM quantity.","metaTitle":"Littelfuse 1206L035/15YR PTC Resettable Fuse, 350 mA, 15V","metaDescription":"Littelfuse 1206L035/15YR POLY-FUSE® PTC resettable fuse, 350 mA hold current, 15V max, 1206 surface-mount. Obsolete; sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Polymeric","Series":"POLY-FUSE®, 1206L","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Lead Spacing":"-","Time to Trip":"100 ms","Current - Max":"100 A","Mounting Type":"Surface Mount","Voltage - Max":"15V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Obsolete","Approval Agency":"-","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)":"750 mA","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"350 mA","Resistance - Initial (Ri) (Min)":"300 mOhms","Resistance - Post Trip (R1) (Max)":"1.2 Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cd6794590906b9a34104657bec909382.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest alternative to the 1206L035/15YR?","answer":"No official pin-compatible successor is recorded. A parametric search for a 350 mA hold, 15 V, 1206 PTC from the same POLY-FUSE® family may yield a current-production equivalent, but board-level verification of footprint and trip characteristics is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L035-15YR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L035-15YR 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}}