{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L003/36YR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L003-36YR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L003-36YR","factsUrl":"https://icboms.com/api/mcp/products/0603L003%2F36YR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE® 0603L series, Polymeric PTC Resettable Fuse, 0603L003/36YR, 30 mA hold, 90 mA trip, 36 V max, 40 A max, 0603 SMD, cURus, TUV.","salesMarkdown":"## 30 mA hold, 90 mA trip — the PTC that resets itself The Littelfuse 0603L003/36YR is a polymeric PTC resettable fuse from the POLY-FUSE® 0603L series, designed to protect low-current signal and power lines in compact surface-mount assemblies. It holds 30 mA continuous without tripping and initiates a fault trip at 90 mA, with a typical time-to-trip of 1 second under fault conditions — fast enough to protect downstream ICs from sustained overcurrent without nuisance tripping on inrush. Rated for a maximum voltage of 36 V and a fault current capability of 40 A, this part covers USB bus protection, battery-charge paths, and low-voltage DC rails in portable and embedded equipment. ## Resistance budget and thermal envelope The operating temperature range spans -40 °C to 85 °C, covering industrial and consumer enclosures; the hold current derates at elevated ambient, so at 85 °C the effective hold current is roughly 70% of the 25 °C rating. ## Package, approvals, and sourcing posture Carries cURus and TUV agency approvals, confirming compliance with UL and IEC safety standards for overcurrent protection devices.","metaTitle":"0603L003/36YR Littelfuse POLY-FUSE PTC, 30 mA hold, 36 V","metaDescription":"0603L003/36YR Littelfuse POLY-FUSE polymeric PTC resettable fuse, 30 mA hold current, 36 VDC, 0603 SMD. Active production, cURus/TUV approved. Quoted to order.","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":"1 s","Current - Max":"40 A","Mounting Type":"Surface Mount","Voltage - Max":"36V","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 0.031\\\" W (1.60mm x 0.80mm)","Current - Trip (It)":"90 mA","Height - Seated (Max)":"-","Operating Temperature":"-40°C~85°C","Current - Hold (Ih) (Max)":"30 mA","Resistance - Initial (Ri) (Min)":"6 Ohms","Resistance - Post Trip (R1) (Max)":"50 Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f3e6b5aefd63d9cd1e6d6b839ee617f3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the hold and trip current of 0603L003/36YR?","answer":"The hold current is 30 mA maximum, and the trip current is 90 mA. Time to trip is typically 1 second at fault current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L003-36YR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L003-36YR 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}}