{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L300SLTHYR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L300SLTHYR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L300SLTHYR","factsUrl":"https://icboms.com/api/mcp/products/1206L300SLTHYR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. POLY-FUSE®, LoRho series PTC resettable fuse, Type Polymeric, 1206 (3216 Metric) Concave package, 3 A hold current, 6 V max, 4 s time to trip, Surface Mount.","salesMarkdown":"## 3 A hold current, 6 V max — the PTC resettable fuse for tight board budgets The Littelfuse 1206L300SLTHYR is a Polymeric PTC resettable fuse from the POLY-FUSE®, LoRho series. ## Initial resistance and post-trip recovery — what the LoRho rating means for your rail The LoRho designation signals a low-resistance PTC: initial resistance (Ri) is 3 mOhms minimum, and post-trip resistance (R1) maxes at 20 mOhms. After a fault clears and the PTC cools, the resistance settles back to the Ri range, so the circuit resumes normal operation without a manual reset. The 50 A maximum fault current rating means the PTC can interrupt a short-circuit current up to that level without rupturing. In a typical USB or battery-protection application where the upstream supply can source tens of amps, this rating ensures the fuse clears the fault before the trace or connector fails. ## Package, approvals, and temperature range — board-fit checklist Approved by cURus and TUV, the part carries the safety certifications required for equipment sold into North American and European markets.","metaTitle":"Littelfuse 1206L300SLTHYR PTC Resettable Fuse, 3A Hold, 6V","metaDescription":"Littelfuse 1206L300SLTHYR POLY-FUSE LoRho PTC resettable fuse. 3A hold current, 6V max, 4s trip time. Active production, cURus/TUV approved. Sourced 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®, LoRho","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Lead Spacing":"-","Time to Trip":"4 s","Current - Max":"50 A","Mounting Type":"Surface Mount","Voltage - Max":"6V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.032\\\" (0.80mm)","lifecycle_stage":"unknown","Size / Dimension":"0.128\\\" L x 0.065\\\" W (3.25mm x 1.65mm)","Current - Trip (It)":"6 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"3 A","Resistance - Initial (Ri) (Min)":"3 mOhms","Resistance - Post Trip (R1) (Max)":"20 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 1206L300SLTHYR and how is it quoted?","answer":"Submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L300SLTHYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L300SLTHYR 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}}