{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L175SLYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L175SLYR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L175SLYR","factsUrl":"https://icboms.com/api/mcp/products/0603L175SLYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE®, LoRho series, PTC resettable fuse, 0603L175SLYR, 1.75 A hold, 3.5 A trip, 6 V max, 5 mOhms initial resistance, 0603 concave package.","salesMarkdown":"## Low-resistance PTC for tight current budgets The Littelfuse 0603L175SLYR is a polymeric PTC resettable fuse from the POLY-FUSE LoRho series, designed to protect low-voltage circuits where every milliohm of series resistance matters. It holds 1.75 A continuously and trips at 3.5 A, with an initial resistance of just 5 mOhms — low enough that it won't steal voltage headroom from a 6 V rail. ## Package and rework reality Housed in a 0603 (1608 Metric) concave package, it measures 1.60 mm x 0.80 mm with a max thickness of 1.00 mm. The concave termination style means the solder fillet wicks up the side of the part — inspect the joint after reflow to confirm wetting, especially if you're hand-soldering or reworking with hot air. The part is surface-mount, so it sits flat on the pad; no lead forming needed. After a trip event, the post-trip resistance climbs to 60 mOhms max — the polymer lattice expands and the conductive filler separates. Once the fault clears and the part cools, it resets to near its original resistance, but the cycle life is finite; repeated tripping at high current (50 A max) will eventually degrade the polymer and increase the baseline resistance. ## Trip behavior and thermal environment Approvals from cURus and TUV mean the part is accepted for use in North American and European equipment without additional agency testing on the PTC itself. The 6 V max voltage rating limits it to low-voltage rails — think USB, battery packs, or logic power — not 12 V or 24 V industrial buses.","metaTitle":"0603L175SLYR Littelfuse POLY-FUSE LoRho PTC, 1.75 A","metaDescription":"0603L175SLYR Littelfuse POLY-FUSE LoRho PTC resettable fuse, 1.75 A hold, 3.5 A trip, 6 V max, 5 mOhm initial resistance. Active, 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":"600 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)":"3.5 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"1.75 A","Resistance - Initial (Ri) (Min)":"5 mOhms","Resistance - Post Trip (R1) (Max)":"60 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":"Where can I buy 0603L175SLYR and how do I get a price?","answer":"The 0603L175SLYR is sourced to order against your BOM quantity through independent and authorized distribution."},{"question":"What is the 0603L175SLYR's hold current and trip current?","answer":"It holds 1.75 A continuously and trips at 3.5 A, with a maximum interrupt current of 50 A at 6 V."},{"question":"What compliance documentation does Littelfuse provide for 0603L175SLYR?","answer":"The part carries cURus and TUV agency approvals, which certify its safety and performance for use in North American and European equipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L175SLYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L175SLYR 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}}