{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L075SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L075SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L075SLYR","factsUrl":"https://icboms.com/api/mcp/products/0603L075SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE®, LoRho series, PTC resettable fuse, Type Polymeric, 0603 (1608 Metric) Concave package, 750 mA hold, 6V max, 50 A max interrupt, Surface Mount.","salesMarkdown":"## Hold current and trip behaviour The Littelfuse 0603L075SLYR is a polymeric PTC resettable fuse from the POLY-FUSE LoRho series, rated for a hold current (Ih) of 750 mA at 6 V max. When the fault current exceeds 1.5 A (It, the trip current), the device heats up and its resistance rises sharply, switching from a low-impedance path to a high-impedance state that limits the current to a leakage level. This trip event happens within 200 ms at 25 °C, fast enough to protect downstream circuitry from sustained overcurrents without a manual reset—once the fault clears and power cycles, the PTC cools and returns to its low-resistance state. ## Package and footprint reality The concave termination style suits automated pick-and-place and wave-solder processes, and the 0603 footprint means it fits standard pad layouts without a stencil change. Initial resistance (Ri) is 20 mOhms minimum; after a trip event, the post-trip resistance (R1) rises to 165 mOhms maximum. This low initial resistance keeps I²R losses minimal during normal operation—critical for battery-powered or high-density boards where every milliohm of series resistance eats into the voltage budget. ## Environmental and compliance envelope The 50 A maximum interrupt current rating means it can safely clear a short-circuit fault up to that level without rupturing or catching fire.","metaTitle":"0603L075SLYR PTC Resettable Fuse, 750 mA Hold, 6V, 0603","metaDescription":"Littelfuse POLY-FUSE LoRho 0603L075SLYR PTC resettable fuse. 750 mA hold current, 6V max, 50 A interrupt. 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":"200 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)":"0.030\\\" (0.75mm)","lifecycle_stage":"unknown","Size / Dimension":"0.063\\\" L x 0.032\\\" W (1.60mm x 0.80mm)","Current - Trip (It)":"1.5 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C~85°C","Current - Hold (Ih) (Max)":"750 mA","Resistance - Initial (Ri) (Min)":"20 mOhms","Resistance - Post Trip (R1) (Max)":"165 mOhms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.8500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1bba25c221c1a0e464f2c46553bc04f5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 0603L075SLYR?","answer":"No official pin-compatible cross-reference is listed for this part. The POLY-FUSE LoRho series includes multiple hold-current variants in the same 0603 concave package, but a direct parametric match would require verifying the hold current, trip current, and resistance values against your circuit's requirements."},{"question":"What compliance documentation does Littelfuse provide for 0603L075SLYR?","answer":"The part carries cURus and TUV safety approvals. RoHS and REACH compliance documentation is typically available from the manufacturer's product page or upon request through the distributor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L075SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L075SLYR 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}}