{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L110SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L110SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L110SLYR","factsUrl":"https://icboms.com/api/mcp/products/1206L110SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE®, LoRho series PTC resettable fuse, Type Polymeric, 1206 (3216 Metric) Concave package, 1.1 A hold current, 6 V max, 50 A max fault current, 300 ms trip time.","salesMarkdown":"## PTC resettable fuse for low-voltage rail protection The Littelfuse 1206L110SLYR is a polymeric PTC resettable fuse from the POLY-FUSE® LoRho series, designed to protect low-voltage DC power rails against overcurrent faults. With a 1.1 A hold current and a 6 V maximum voltage rating, it sits in the 1206 surface-mount footprint — a common choice for USB ports, battery packs, and portable electronics where resettable protection eliminates fuse replacement. ## Hold current, trip current, and what they mean for your circuit The 1.1 A hold current (Ih) is the maximum steady-state current the device passes without tripping at 25 °C ambient. Above that, the 2.2 A trip current (It) defines the threshold where the PTC resistance rises sharply — the part switches from a low-resistance state (15 mOhms initial, Ri min) to a high-resistance state (100 mOhms post-trip, R1 max), limiting current to a leakage level. Time to trip is 300 ms at the rated fault condition — fast enough to protect downstream components from sustained overcurrent without nuisance tripping on inrush spikes. The 50 A maximum fault current rating means the device can interrupt short circuits up to that level without rupturing, provided the supply voltage stays at or below 6 V. The concave termination style improves solder fillet visibility during AOI. ## Compliance and approvals The part carries cURus and TUV agency approvals, indicating it has passed safety testing for overcurrent protection devices under UL 1434 and IEC 60738-1 standards. This simplifies acceptance in equipment destined for North American and European markets.","metaTitle":"Littelfuse 1206L110SLYR PTC Resettable Fuse, 1.1A Hold, 6V","metaDescription":"Littelfuse 1206L110SLYR POLY-FUSE LoRho PTC resettable fuse. 1.1A hold current, 6V max, 1206 package. Active production, cURus/TUV approved. Request a quote.","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":"300 ms","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":"0.126\\\" 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)":"15 mOhms","Resistance - Post Trip (R1) (Max)":"100 mOhms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.8500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ba263e768b43be9aa2568c602b905b30.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1206L110SLYR and check availability?","answer":"The 1206L110SLYR is an active part sourced through authorized and independent distribution."},{"question":"What is the hold current and trip current of the 1206L110SLYR?","answer":"The hold current (Ih) is 1.1 A, and the trip current (It) is 2.2 A. The device will pass 1.1 A continuously without tripping at 25 °C; above 2.2 A it transitions to a high-resistance state within 300 ms."},{"question":"What safety approvals does the 1206L110SLYR carry?","answer":"The 1206L110SLYR is approved by cURus (UL 1434) and TUV (IEC 60738-1), covering North American and European safety requirements for polymeric PTC overcurrent protectors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L110SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L110SLYR 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}}