{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1206L110/16WR","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1206L110-16WR","canonicalUrl":"https://icboms.com/littelfuse-inc/1206L110-16WR","factsUrl":"https://icboms.com/api/mcp/products/1206L110%2F16WR","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse POLY-FUSE® 1206L series, PTC resettable fuse, surface mount 1206 (3216 Metric) concave package, 1.1 A hold current, 16 VDC max, 100 A fault current rating.","salesMarkdown":"## What this PTC does on the board The 1206L110/16WR is a polymeric PTC resettable fuse from Littelfuse's POLY-FUSE 1206L series. It sits on the board as a non-destructive overcurrent protector — when a fault pushes current past its trip threshold, the polymer element heats up, its resistance jumps, and it limits the current to a safe level. Once power cycles and the element cools, it resets back to its low-resistance state. No fuse replacement, no service call. ## Hold current, trip current, and what they mean for your rail Rated for 1.1 A hold current (Ih) at 25 °C — this is the continuous current it passes without tripping. The trip current (It) is 2.2 A, meaning the device starts its resistance transition somewhere above that threshold. At 100 A max fault current and 16 V max voltage, it handles short-circuit events on low-voltage rails typical of USB, battery, or logic power inputs. Trip time is 100 ms at the rated fault condition — fast enough to protect downstream components from sustained overcurrent, but slow enough to ignore inrush from a capacitive load on the same rail. The initial resistance (Ri) is 40 mOhms minimum, and after tripping the post-trip resistance (R1) climbs to 210 mOhms maximum. That post-trip resistance is what holds the current down until the fault clears. ## Package, footprint, and temperature range The concave termination profile makes it easy to inspect solder joints under a microscope after reflow. No special pad geometry needed; it fits the standard 1206 land pattern. The hold current derates above 25 °C; at 85 °C the effective Ih is roughly half the 25 °C rating, so budget for that if the board runs hot. ## Approvals and compliance Carries cURus and TUV approvals — accepted in North American and European equipment without additional agency testing for the fuse element itself.","metaTitle":"Littelfuse 1206L110/16WR PTC Resettable Fuse, 1.1A Hold, 16V","metaDescription":"Littelfuse 1206L110/16WR POLY-FUSE polymeric PTC resettable fuse, 1.1A hold current, 16V max, 1206 SMD package. 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®, 1206L","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Lead Spacing":"-","Time to Trip":"100 ms","Current - Max":"100 A","Mounting Type":"Surface Mount","Voltage - Max":"16V","Package / Case":"1206 (3216 Metric), Concave","Product Status":"Active","Approval Agency":"cURus, TUV","Thickness (Max)":"0.030\\\" (0.75mm)","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.065\\\" W (3.20mm x 1.65mm)","Current - Trip (It)":"2.2 A","Height - Seated (Max)":"-","Operating Temperature":"-40°C ~ 85°C","Current - Hold (Ih) (Max)":"1.1 A","Resistance - Initial (Ri) (Min)":"40 mOhms","Resistance - Post Trip (R1) (Max)":"210 mOhms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cd6794590906b9a34104657bec909382.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1206L110-16WR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1206L110-16WR 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}}