{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE20A/54","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE20A-54","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE20A-54","factsUrl":"https://icboms.com/api/mcp/products/1.5KE20A%2F54","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® series, TVS Zener, unidirectional, 1.5KE20A/54, DO-201AA/DO-27 axial, 1500W peak pulse, 17.1V standoff, 27.7V clamp.","salesMarkdown":"## Protection window and pulse capability The 1.5KE20A/54: The reverse standoff voltage of 17.1 V means the device remains non-conductive below that rail — it only begins to avalanche when the transient exceeds the minimum breakdown voltage of 19 V. This 17.1 V standoff makes the part suitable for protecting 12 V or 15 V DC rails where the nominal supply stays below the standoff threshold, but a transient spike up to 27.7 V is clamped before reaching downstream silicon. The 1500 W rating at the 10/1000 µs pulse defines the energy-handling ceiling — shorter pulses (8/20 µs) allow higher peak current, but the datasheet's derating curve governs the actual safe operating area at elevated ambient temperatures. ## Package and deployment context Housed in a DO-201AA / DO-27 axial-lead through-hole package, the 1.5KE20A/54 mounts into boards that already carry a hole pattern for this footprint — common in legacy power supplies, industrial control boards, and telecom line cards where the axial body is wave-soldered or hand-soldered into plated through-holes. The wide junction temperature margin also matters for derating the peak pulse power at high ambient — a 1500 W rating at 25 °C drops to roughly 50 % at 175 °C, per the standard TVS derating curve. ## Sourcing reality for an obsolete TVS Because the part is obsolete, a buyer evaluating a new design should select an active TVS with a matching standoff voltage (17.1 V) and comparable clamping performance.","metaTitle":"Vishay 1.5KE20A/54 TransZorb TVS, 1500W, 17.1V Standoff","metaDescription":"Vishay 1.5KE20A/54 TransZorb unidirectional TVS, 1500W peak pulse, 17.1V standoff, 27.7V clamp.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"TransZorb®","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Obsolete","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE20","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"19V","Voltage - Clamping (Max) @ Ipp":"27.7V","Voltage - Reverse Standoff (Typ)":"17.1V","Current - Peak Pulse (10/1000µs)":"54.2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does the 1.5KE20A/54 use?","answer":"It comes in a DO-201AA / DO-27 axial-lead through-hole package, suitable for boards with plated through-holes and wave or hand soldering."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE20A-54","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE20A-54 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}