{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L150/12SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L150-12SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L150-12SLYR","factsUrl":"https://icboms.com/api/mcp/products/1206L150%2F12SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE®, LoRho series, Polymeric PTC resettable fuse, 1206 (3216 Metric) concave package, 1.5 A hold current, 12 V max voltage, 10 mOhm initial resistance.","salesMarkdown":"## 1.5 A hold, 12 V rail — the LoRho advantage for low-voltage protection The 1206L150/12SLYR is a Littelfuse POLY-FUSE LoRho polymeric PTC rated for 1.5 A hold current at 12 V max. The LoRho designation means initial resistance is just 10 mOhms typical — that is roughly one-tenth the Ri of a standard 1206 PTC at this hold current, so the voltage drop across the fuse at 1.5 A is under 15 mV. Trips in 300 ms at 8 A fault current — fast enough to protect the downstream regulator or connector before the PCB trace temperature rises, but slow enough to ride through inrush from a 10 µF bypass cap bank without nuisance tripping. ## Resistance budget and post-trip recovery Post-trip resistance (R1) maxes at 80 mOhms. After the fault clears and the PTC cools, the resistance settles back near the initial 10 mOhm floor — the LoRho formulation uses a lower-resistivity polymer filler that recovers closer to the original Ri than standard PTCs. For a USB 2.0 port supplying 1.5 A, the I²R loss after a fault event stays under 180 mW, keeping the 1206 package within its thermal budget. The 50 A max fault current rating means this part can survive a direct short to a 12 V lead-acid battery or a 12 V rail with a 600 mOhm source impedance — the PTC transitions to a high-resistance state before the package cracks. ## Active lifecycle, approvals, and sourcing posture The cURus and TUV approvals cover North American and European equipment safety standards; no additional agency review needed for UL 60950-1 or IEC 62368-1 end-product certification. Sourced through authorized and independent distribution channels. The 1206 footprint and tape-and-reel packaging (Cut Tape or full reel) feed directly into a standard pick-and-place line with no MSL bake requirement.","metaTitle":"1206L150/12SLYR Littelfuse PTC Resettable Fuse, 1.5A, 12V","metaDescription":"1206L150/12SLYR Littelfuse POLY-FUSE LoRho PTC, 1.5A hold, 12V max, 10 mOhm Ri. Active production. cURus/TUV. 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®, 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)":"3 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C~85°C","Current - Hold (Ih) (Max)":"1.5 A","Resistance - Initial (Ri) (Min)":"10 mOhms","Resistance - Post Trip (R1) (Max)":"80 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 approvals does 1206L150/12SLYR carry?","answer":"It is approved by cURus (North American safety) and TUV (European safety). These certifications cover the PTC's use in equipment requiring UL 60950-1 or IEC 62368-1 compliance."},{"question":"Can this PTC handle a short circuit to a 12 V battery?","answer":"Yes. The maximum fault current rating is 50 A, and the 12 V max voltage covers a fully charged lead-acid battery (12.6 V nominal). The PTC will trip within 300 ms at 8 A fault current, and the package is rated to survive the full 50 A short-circuit condition without rupturing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L150-12SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L150-12SLYR 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}}