{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L035YR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L035YR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L035YR","factsUrl":"https://icboms.com/api/mcp/products/0603L035YR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE® 0603L series, Polymeric PTC Resettable Fuse, 0603 (1608 Metric) Concave package, 350 mA hold, 750 mA trip, 6V max, 40 A max, 100 ms trip time.","salesMarkdown":"## Hold current and trip characteristics The 0603L035YR is a Littelfuse POLY-FUSE® series polymeric PTC resettable fuse in a 0603 concave surface-mount package. It holds 350 mA continuously (Ih) and trips at 750 mA (It), with a maximum trip time of 100 ms at fault current. Rated for a maximum voltage of 6V and a maximum fault current of 40 A, this PTC is sized for low-voltage rail protection — USB VBUS, battery lines, or any 3.3V/5V supply that needs a resettable overcurrent guard without a fuse replacement. The initial resistance is 200 mΩ minimum (Ri), rising to 1 Ω maximum after a trip event (R1). The post-trip resistance is the key number for downstream voltage drop: at 350 mA load, expect under 0.35 V drop after reset, but budget the full 1 Ω ceiling if the part has cycled. The concave termination profile means the solder fillet wicks up the end cap — standard reflow profile for 0603 chip components applies. Surface-mount mounting with tape-and-reel or cut-tape packaging.","metaTitle":"0603L035YR Littelfuse PTC Resettable Fuse, 350mA, 6V, 0603","metaDescription":"0603L035YR Littelfuse POLY-FUSE polymeric PTC resettable fuse, 350 mA hold, 6V max, 40A short-circuit, 0603 SMD. Active production, cURus/TUV. Buy 0603L035YR.","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®, 0603L","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Lead Spacing":"-","Time to Trip":"100 ms","Current - Max":"40 A","Mounting Type":"Surface Mount","Voltage - Max":"6V","Package / Case":"0603 (1608 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.061\\\" (1.55mm)","lifecycle_stage":"unknown","Size / Dimension":"0.063\\\" L x 0.032\\\" W (1.60mm x 0.80mm)","Current - Trip (It)":"750 mA","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"350 mA","Resistance - Initial (Ri) (Min)":"200 mOhms","Resistance - Post Trip (R1) (Max)":"1 Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e4b6b6d09813d8b80152762a3dffab34.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L035YR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L035YR 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}}