{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L025YR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L025YR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L025YR","factsUrl":"https://icboms.com/api/mcp/products/0603L025YR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE® 0603L series, PTC resettable fuse, 0603 (1608 Metric) concave package, 250 mA hold current, 9V max, 40A max fault current, surface mount.","salesMarkdown":"## Active production, sealed-reel surplus angle The 0603L025YR is an active-production Littelfuse POLY-FUSE polymeric PTC resettable fuse. For surplus-lot buyers, this means sealed reels with consistent date-codes are the norm — no end-of-life scramble, no mixed-date auction lots that smell like repackaged returns. ## Hold current and trip performance Rated at 250 mA hold current (Ih) with a 550 mA trip current (It) — the fuse stays latched below 250 mA and trips within 80 ms when the fault exceeds the trip threshold. The initial resistance floor is 500 mOhms, rising to a 3 Ohm max post-trip, which limits voltage drop during normal operation and resets to a higher resistance after a fault clears. ## Fault handling and approvals Handles up to 40 A fault current at 9 V max — the voltage ceiling is low, so this part is best suited for low-voltage DC rail protection (USB, battery, or logic supplies). cURus and TUV agency approvals mean it passes UL and IEC-based safety tests for polymeric PTCs, covering the regulatory gate for most equipment sold into North America and Europe. ## Package and board-fit Housed in a 0603 (1608 Metric) concave surface-mount package, 1.60 mm x 0.80 mm footprint with a 0.75 mm max thickness. The concave termination profile suits standard reflow profiles and is compatible with tape-and-reel handling for high-volume pick-and-place.","metaTitle":"Littelfuse 0603L025YR PTC Resettable Fuse, 250 mA Hold, 9V","metaDescription":"Littelfuse 0603L025YR POLY-FUSE polymeric PTC resettable fuse, 250 mA hold current, 9V max, 40A max fault. Active, sourced to order. 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®, 0603L","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Lead Spacing":"-","Time to Trip":"80 ms","Current - Max":"40 A","Mounting Type":"Surface Mount","Voltage - Max":"9V","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)":"550 mA","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"250 mA","Resistance - Initial (Ri) (Min)":"500 mOhms","Resistance - Post Trip (R1) (Max)":"3 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":[{"question":"How do I get current pricing and availability for 0603L025YR?","answer":"Pricing and availability are confirmed at quote time against your BOM quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L025YR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L025YR 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}}