{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE27CAHE3/51","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE27CAHE3-51","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE27CAHE3-51","factsUrl":"https://icboms.com/api/mcp/products/1.5KE27CAHE3%2F51","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb® series, Zener TVS diode, 1.5KE27CAHE3/51, 1500W peak pulse, 37.5V clamping, bidirectional, DO-201AA axial, bulk.","salesMarkdown":"The 1.5KE27CAHE3/51: The 23.1V reverse standoff and 25.7V minimum breakdown voltage place it in the 24V rail protection class — common in automotive 24V systems, industrial 24V DC buses, and battery-powered equipment where a single surge event must not exceed the downstream device's abs-max rating. AEC-Q101 qualification (the automotive discrete semiconductor reliability standard) means this part has passed temperature cycling, high-temperature reverse bias, and ESD stress tests per the automotive industry's zero-defect expectations. The -55°C to 175°C operating junction range covers under-hood and engine-bay thermal profiles — a 24V truck ECU or a battery-management module in a hybrid pack sees these extremes during hot-soak and cold-crank. ## Package and rework — DO-201AA axial, through-hole DO-201AA (also known as DO-27) axial leaded package — the body is about 9 mm long with 1.3 mm diameter leads. Through-hole mounting means it survives a hot-air rework cycle without the pad-lifting risk of a small SMD TVS; the leads wick heat away from the junction during soldering. Orientation is unambiguous: the cathode band marks the polarity on a unidirectional part, but this is a bidirectional device — no polarity concern, which simplifies board stuffing and reduces the chance of a reverse-insertion fault on the line. Bulk packaging — the parts ship loose in a bag or tube, not on tape-and-reel. For a rework bench or low-volume production run, that is fine; for automated pick-and-place, the axial leads require a forming step or a through-hole insertion machine. The 1.5KE base product number tells you the mechanical outline is shared across the whole 1.5KE family — same footprint, same hole pattern, same lead bend radius. ## Lifecycle — obsolete, sourced through independent channels Because it is obsolete, a board-spin replacement is the long-term fix. The functional replacement would be a 1500W bidirectional TVS with a 24V standoff and 37.5V clamp in a similar package — but the pinout and footprint are not guaranteed to match without a layout change. For existing boards in service, sourcing the exact 1.5KE27CAHE3/51 through surplus is the only drop-in option.","metaTitle":"1.5KE27CAHE3/51 Vishay TVS, 1500W, 37.5V Clamp, DO-201AA","metaDescription":"Vishay 1.5KE27CAHE3/51 Zener TVS, 1500W peak pulse, 37.5V clamp, AEC-Q101, obsolete — sourced to order via independent distribution. RFQ for availability.","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":"1.5KE27","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Voltage - Breakdown (Min)":"25.7V","Voltage - Clamping (Max) @ Ipp":"37.5V","Voltage - Reverse Standoff (Typ)":"23.1V","Current - Peak Pulse (10/1000µs)":"40A"}},"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":"Where can I buy the 1.5KE27CAHE3/51 and how is it quoted?","answer":"Sourced through independent distribution. Submit an RFQ for lot-specific pricing and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE27CAHE3-51","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/1.5KE27CAHE3-51 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}}