{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE20A-TB","brand":"Littelfuse Inc.","brandSlug":"littelfuse-inc","productSlug":"1.5KE20A-TB","canonicalUrl":"https://icboms.com/littelfuse-inc/1.5KE20A-TB","factsUrl":"https://icboms.com/api/mcp/products/1.5KE20A-TB","rawCanonicalId":null},"summary":{"shortDescription":"Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE20A-TB, 1500W peak pulse power, 17.1V standoff, 27.7V clamp, unidirectional, DO-201AA axial, through hole, Tape & Box.","salesMarkdown":"## 1500 W surge clamp for 17.1 V rails The 1.5KE20A-TB: When the protected line exceeds the 19 V minimum breakdown threshold, the Zener junction avalanches and holds the voltage to a maximum 27.7 V at the 54.9 A peak pulse current (10/1000 µs waveform). This clamping ceiling keeps downstream ICs safe from inductive kickback, lightning-induced surges, and ESD events in general-purpose signal and low-voltage power circuits. The unidirectional configuration (single channel) is polarity-sensitive — the cathode band must face the positive rail. For AC or bidirectional protection, two devices back-to-back or a bidirectional variant is needed. ## DO-201 axial package and thermal range Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE20A-TB mounts through hole and suits point-to-point wiring on terminal blocks, bus bars, or perforated boards.","metaTitle":"Littelfuse 1.5KE20A-TB TVS Diode, 1500W, 17.1V Standoff","metaDescription":"Littelfuse 1.5KE20A-TB Zener TVS diode, 1500W peak pulse power, 17.1V standoff, 27.7V clamp. Active production, DO-201 axial package. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Littelfuse Inc.","Type":"Zener","Series":"1.5KE","Package":"Tape & Box (TB)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"19V","Voltage - Clamping (Max) @ Ipp":"27.7V","Voltage - Reverse Standoff (Typ)":"17.1V","Current - Peak Pulse (10/1000µs)":"54.9A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2611","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1ea870152ad203d90f672f2af1c1ed0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the 1.5KE20A-TB suitable for AC mains power line protection?","answer":"No. The device has no power line protection rating — it is intended for DC signal and low-voltage power rail clamping. The 17.1 V standoff voltage and unidirectional polarity also make it unsuitable for AC mains circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/littelfuse-inc/1.5KE20A-TB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/littelfuse-inc/1.5KE20A-TB 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}}