{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L150SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L150SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L150SLYR","factsUrl":"https://icboms.com/api/mcp/products/0603L150SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE®, LoRho series PTC resettable fuse, 0603L150SLYR, Type Polymeric, 1.5 A hold current, 3 A trip, 50 A max, 6 V, 0603 concave SMD package, cURus, TUV approved.","salesMarkdown":"## What the 1.5 A hold current means for your load budget The Littelfuse 0603L150SLYR is a POLY-FUSE LoRho series polymeric PTC resettable fuse that protects low-voltage DC circuits up to 6 V. Its 1.5 A hold current (Ih) is the maximum steady-state current the fuse passes without tripping — below this threshold the PTC element stays in its low-resistance crystalline state. ## Trip threshold and fault response The 3 A trip current (It) is the minimum fault current that forces the PTC into its high-resistance state within 500 ms at 25°C. A short-circuit pulling 8 A will trip this device in the rated 500 ms, while a marginal 2.8 A overload may take several seconds or never trip — the trip time curve is non-linear and slows near the threshold. After tripping, the fuse latches in a high-resistance state (80 mOhms max post-trip), limiting the fault current to a few hundred milliamps. The 50 A maximum interrupt rating means the device can withstand a direct short on a 6 V supply capable of delivering 50 A without rupturing or catching fire. The initial resistance of 7 mOhms minimum keeps I²R losses under 16 mW at 1.5 A — negligible for a 0603 package but important to derate for ambient temperature above 25°C.","metaTitle":"Littelfuse 0603L150SLYR PTC Resettable Fuse, 1.5A Hold, 0603","metaDescription":"Littelfuse 0603L150SLYR POLY-FUSE LoRho PTC resettable fuse, 1.5A hold current, 3A trip, 50A max, 6V, 0603 SMD. Active production. 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":"500 ms","Current - Max":"50 A","Mounting Type":"Surface Mount","Voltage - Max":"6V","Package / Case":"0603 (1608 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.039\\\" (1.00mm)","lifecycle_stage":"unknown","Size / Dimension":"0.063\\\" L x 0.032\\\" W (1.60mm x 0.80mm)","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)":"7 mOhms","Resistance - Post Trip (R1) (Max)":"80 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 0603L150SLYR's trip current rating?","answer":"The trip current (It) is 3 A, with a typical time-to-trip of 500 ms at 8 A. The hold current (Ih) is 1.5 A maximum."},{"question":"What approvals does the 0603L150SLYR carry?","answer":"cURus and TUV approvals are listed, covering UL 1434 and IEC 60738-1 standards for polymeric PTC overcurrent protectors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L150SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L150SLYR 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}}