{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"0603L020YR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"0603L020YR","canonicalUrl":"https://icboms.com/littelfuse-inc/0603L020YR","factsUrl":"https://icboms.com/api/mcp/products/0603L020YR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE® 0603L series, PTC resettable fuse, polymeric, 0603 (1608 Metric) SMD, 200 mA hold, 9 VDC max, 40 A max fault current, 600 ms trip time.","salesMarkdown":"## Hold current and voltage ceiling for a 0603 PTC Rated for 200 mA hold current (Ih) at 25 °C ambient, this Littelfuse POLY-FUSE 0603L020YR trips at 500 mA (It) within 600 ms under fault. The polymeric PTC can interrupt up to 40 A of fault current, which covers most low-voltage rail shorts upstream of a current-limited supply. Initial series resistance is 550 mOhms minimum; after a trip event the resistance rises to 3.5 Ohms maximum — this post-trip value is the steady-state series resistance the load sees until power is cycled and the PTC resets. ## 0603 footprint and board integration Surface-mount assembly on standard FR-4; the concave termination profile mates with the same land pattern as a standard 0603 resistor or capacitor — no special footprint required. Operating temperature range is -40°C to +85°C, covering commercial and most industrial ambient conditions. The hold current derates above 25 °C; at 85 °C the effective Ih drops to roughly 50% of the 25 °C rating — a design consideration for enclosures with internal heating. ## Agency approvals and compliance documentation Recognized by cURus and TUV — the two most common safety agency marks for polymeric PTCs in North American and European equipment. The approvals cover the device's function as a thermally-limited overcurrent protector under UL 1434 and IEC 60738-1.","metaTitle":"Littelfuse 0603L020YR PTC Resettable Fuse, 200 mA, 9V, 0603","metaDescription":"Littelfuse 0603L020YR POLY-FUSE polymeric PTC resettable fuse, 200 mA hold current, 9V max, 40 A max fault, 0603 SMD. Active production, 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":"600 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)":"500 mA","Height - Seated (Max)":"-","Operating Temperature":"-40°C~85°C","Current - Hold (Ih) (Max)":"200 mA","Resistance - Initial (Ri) (Min)":"550 mOhms","Resistance - Post Trip (R1) (Max)":"3.5 Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f3e6b5aefd63d9cd1e6d6b839ee617f3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the 0603L020YR's hold current and trip current?","answer":"Hold current (Ih) is 200 mA maximum at 25 °C; trip current (It) is 500 mA. At rated fault, the device trips within 600 ms."},{"question":"What safety agency approvals does the 0603L020YR carry?","answer":"The device is approved by cURus and TUV, covering UL 1434 and IEC 60738-1 standards for polymeric PTC overcurrent protectors."},{"question":"How is the 0603L020YR supplied for volume purchases?","answer":"Available on tape and reel (TR) or cut tape (CT) in the 0603 SMD package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/0603L020YR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/0603L020YR 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}}