{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1CA-E3/1","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE9.1CA-E3-1","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1CA-E3-1","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1CA-E3%2F1","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® Zener TVS, 1.5KE9.1CA-/1, 1500W peak pulse, 7.78V reverse standoff, 13.4V clamping, bidirectional, DO-201AA axial, Bulk.","salesMarkdown":"## TransZorb® TVS, 1500W, Bidirectional The 1.5KE9.1CA-E3/1: It clamps transients at 13.4V maximum while conducting 112A peak pulse current, making it a fit for protecting 7.78V nominal rails in general-purpose DC power and signal lines. Packaged in the DO-201AA (DO-27) axial-lead form factor, it is a through-hole part suited for point-of-entry suppression on a PCB or terminal block — the axial body sits above the board, which matters for layout clearance in crowded enclosures. ## Clamping Profile and Operating Envelope The breakdown voltage range starts at 8.65V minimum, with a reverse standoff of 7.78V typical — the rail must stay below this standoff to avoid leakage during normal operation. The 13.4V clamping ceiling limits the voltage spike seen by the downstream silicon, which for a 5V or 3.3V logic rail would still require a secondary clamp or a lower-voltage TVS in series. The 1500W rating is derated above 25°C per the standard pulse derating curve — at 175°C the peak power capability drops to approximately 25% of the 25°C value. Vishay lists the 1.5KE9.1CA-/1 as obsolete. No official successor order code is recorded on the lifecycle notice — the 1.5KE series has been superseded by newer TransZorb families, but a direct pin-compatible replacement from Vishay is not documented in this record. For a BOM line that calls out this exact part number, the supply channel is independent distribution holding end-of-life inventory.","metaTitle":"Vishay 1.5KE9.1CA-E3/1 TransZorb TVS, 1500W, Bidirectional","metaDescription":"Obsolete Vishay 1.5KE9.1CA-E3/1 Zener TVS diode, 1500W peak pulse, 13.4V clamping, bidirectional. Sourced to order against RFQ through independent distribution.","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":"Bulk","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":"1.5KE9.1","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Voltage - Breakdown (Min)":"8.65V","Voltage - Clamping (Max) @ Ipp":"13.4V","Voltage - Reverse Standoff (Typ)":"7.78V","Current - Peak Pulse (10/1000µs)":"112A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1CA-E3-1","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/1.5KE9.1CA-E3-1 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}}