{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L110/12SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L110-12SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L110-12SLYR","factsUrl":"https://icboms.com/api/mcp/products/1206L110%2F12SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc., POLY-FUSE® LoRho series, Polymeric PTC resettable fuse, 1206L110/12SLYR, 1.1A hold current, 12V max, 300ms trip time, 1206 concave package.","salesMarkdown":"## Polymeric PTC for tight board spots The Littelfuse 1206L110/12SLYR is a Polymeric PTC resettable fuse from the POLY-FUSE® LoRho series, designed to protect circuits by tripping when current exceeds 2.2 A (It) and resetting once the fault clears. With a 1.1 A hold current (Ih) at 12 V max, it sits in the 1206 (3216 Metric) concave package — a common footprint for overcurrent protection on dense PCBs where board space is tight. ## Trip response and resistance profile This PTC trips in 300 ms (typical) at the rated current, fast enough to protect downstream components from sustained overcurrent without nuisance tripping on brief inrush. The initial resistance (Ri) is a minimum of 15 mOhms, keeping I²R losses low during normal operation; after tripping, the post-trip resistance (R1) rises to a maximum of 130 mOhms, holding the fault current in check until power is cycled. Rated for a maximum fault current of 50 A at 12 V, it handles short-circuit events up to that level without rupturing. ## Compliance and sourcing posture No direct pin-compatible second source is listed from the manufacturer, but the POLY-FUSE LoRho family includes other hold-current ratings in the same 1206 footprint if the 1.1 A value needs adjustment.","metaTitle":"Littelfuse 1206L110/12SLYR PTC Resettable Fuse, 1.1A Hold","metaDescription":"Littelfuse 1206L110/12SLYR Polymeric PTC resettable fuse, 1.1A hold current, 12V max, 300ms trip time. Active production. cURus, TUV approved. Request 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":"12V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.033\\\" (0.85mm)","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)":"130 mOhms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1bba25c221c1a0e464f2c46553bc04f5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the trip time and how does it affect circuit protection?","answer":"The typical time to trip is 300 ms at the rated current. This means it responds quickly to sustained overcurrents but tolerates brief transients like capacitor inrush, making it suitable for USB port protection, battery packs, and low-voltage DC power rails."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L110-12SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L110-12SLYR 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}}