{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L150SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L150SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L150SLYR","factsUrl":"https://icboms.com/api/mcp/products/1206L150SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc., POLY-FUSE® LoRho series, Polymeric PTC resettable fuse, 1206L150SLYR, 1.5 A hold, 6 V max, 1206 (3216 Metric) concave package, surface mount.","salesMarkdown":"## What the 1.5 A hold current means for your board The 1206L150SLYR is a polymeric PTC resettable fuse from Littelfuse's POLY-FUSE LoRho series, rated for a 1.5 A hold current (Ih) at 25 °C. This is the continuous current the device passes without tripping — stay at or below it in normal operation. The trip current (It) is 3.9 A, meaning the device will start to switch to a high-resistance state when the fault current exceeds that threshold. With a maximum voltage rating of 6 V, this part is sized for low-voltage DC rails — think USB power, battery protection, or peripheral port outputs. ## Trip time and resistance — the real-world behavior Time to trip is 300 ms at 25 °C under fault conditions. That is fast enough to protect downstream silicon from overcurrent damage in most low-voltage applications, but slow enough to avoid nuisance tripping from inrush current spikes on capacitive loads. Initial resistance (Ri) is 10 mOhms minimum, and post-trip resistance (R1) rises to 65 mOhms maximum. The LoRho series is designed for lower resistance than standard PTCs — the 10 mOhm floor means less voltage drop and heat generation at the 1.5 A hold current, which matters when the fuse sits on a power rail feeding sensitive logic. ## Package, footprint, and temperature range The hold current derates at elevated temperatures — at 85 °C the 1.5 A rating drops to roughly 60-70% of the 25 °C value, so factor that into the thermal budget if the fuse sits near a hot regulator or in a sealed enclosure.","metaTitle":"Littelfuse 1206L150SLYR PTC Resettable Fuse, 1.5A Hold, 6V","metaDescription":"Littelfuse 1206L150SLYR POLY-FUSE LoRho PTC resettable fuse, 1.5A hold current, 6V max, 1206 package. Active production, sourced to order. cURus, TUV approved.","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)":"0.028\\\" (0.70mm)","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.065\\\" W (3.20mm x 1.65mm)","Current - Trip (It)":"3.9 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)":"65 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":"What is the hold current and trip current for 1206L150SLYR?","answer":"Hold current (Ih) is 1.5 A maximum at 25 °C. Trip current (It) is 3.9 A — the device transitions to a high-resistance state when the current exceeds this threshold."},{"question":"What approvals does the 1206L150SLYR carry?","answer":"The part is approved by cURus (North American safety) and TUV (European safety) for overcurrent protection applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L150SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L150SLYR 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}}