{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE20CAHE3/51","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE20CAHE3-51","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE20CAHE3-51","factsUrl":"https://icboms.com/api/mcp/products/1.5KE20CAHE3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb®, TVS Zener, 1.5KE20CAHE3/51, 1500W, 17.1V reverse standoff, 27.7V clamp, DO-201AA axial.","salesMarkdown":"## Obsolete — sourcing through independent channels Vishay has marked the 1.5KE20CAHE3/51 as obsolete. ## Automotive-grade transient suppressor — what the ratings mean for fit When a transient exceeds 19 V (the minimum breakdown voltage), the device clamps at 27.7 V maximum while shunting 54.2 A of peak pulse current (10/1000 µs waveform). The single bidirectional channel protects both polarities in one package, so a single device covers positive and negative transients on a signal or low-power bus without needing two unidirectional diodes back-to-back. ## Package and board-fit — DO-201AA axial through-hole Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE20CAHE3/51 is a through-hole device. The axial body with wire leads solders into a board or terminal block — the lead spacing and hole diameter follow the standard DO-201 footprint, so it drops into existing layouts without a board spin. The operating temperature range spans -55°C to 175°C, covering the full under-hood automotive thermal profile. At the high end, the leakage current through the Zener junction will increase, but the junction itself is rated for continuous operation at 175°C. ## No power line protection — signal and data bus duty The datasheet explicitly states no power line protection — this TVS is designed for signal, data, or low-power DC bus protection, not for mains or high-energy AC line suppression. On a 12 V automotive sensor bus or a 15 V control rail, the 17.1 V standoff and 27.7 V clamp are a clean fit; on a 24 V truck system the standoff is too low.","metaTitle":"Vishay 1.5KE20CAHE3/51 TVS, 1500W, 17.1V, DO-201AA","metaDescription":"Obsolete Vishay 1.5KE20CAHE3/51 bidirectional TVS diode, 1500W peak pulse, 17.1V standoff, AEC-Q101. Sourced to order against RFQ through independent channels.","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":"Automotive, AEC-Q101, TransZorb®","Package":"Bulk","Applications":"Automotive","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","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","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":"$0.5346","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/55e3e40e24fd2c3f96443c3e231bf459.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the 1.5KE20CAHE3/51?","answer":"A functional replacement would need to match the 17.1 V standoff, 27.7 V clamp, 1500 W peak pulse rating, bidirectional channel, and DO-201AA axial package — confirm the BOM position before substituting."},{"question":"What compliance documentation does Vishay provide for the 1.5KE20CAHE3/51?","answer":"The part carries AEC-Q101 automotive qualification. RoHS and REACH compliance documentation is available from Vishay for this series. No UL or IEC certification is listed in the product record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE20CAHE3-51","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/1.5KE20CAHE3-51 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}}