{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91CAH","brand":"Taiwan Semiconductor Corporation","brandSlug":"taiwan-semiconductor-corporation","productSlug":"1.5KE91CAH","canonicalUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE91CAH","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91CAH","rawCanonicalId":null},"summary":{"shortDescription":"Taiwan Semiconductor 1.5KE series, Automotive Zener TVS Diode, 1.5KE91CAH, 1500W peak pulse, 77.8V standoff, 125V clamping, DO-201AA axial, AEC-Q101.","salesMarkdown":"## 1500 W peak pulse — what it means for your rail The 1.5KE91CAH: That 1500 W rating means it can clamp a transient up to 12.6 A peak current without failing — the device absorbs the surge and limits the voltage across your protected circuit to 125 V max. The reverse standoff voltage is 77.8 V, so it sits across a 72 V or 75 V rail without conducting during normal operation. Breakdown starts at 86.5 V minimum, giving a clean trigger threshold before the clamping event. ## Automotive-grade transient protection The axial DO-201AA package (through-hole) handles the thermal dissipation from repeated pulse events better than a surface-mount equivalent. The DO-201AA (DO-27) axial package requires a 1.0 mm diameter hole in the PCB — typical lead diameter is 0.96 mm. The body length is about 7.5 mm; plan for adequate clearance from adjacent components when mounting vertically or horizontally. Tape & Reel packaging (TR) is standard for automated insertion. The base product number is 1.5KE91 — the 'CAH' suffix denotes bidirectional (CA) and automotive grade (H).","metaTitle":"1.5KE91CAH TVS Diode, 1500W, 77.8V Standoff, DO-201","metaDescription":"Taiwan Semiconductor 1.5KE91CAH bidirectional Zener TVS, 1500W peak pulse, 77.8V standoff, AEC-Q101 automotive grade. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Taiwan Semiconductor Corporation","Type":"Zener","Grade":"Automotive","Series":"1.5KE","Package":"Tape & Reel (TR)","Applications":"-","Mounting Type":"Through Hole","Qualification":"AEC-Q101","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5KE91","Operating Temperature":"-55°C ~ 175°C (TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"DO-201","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5792","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a2b73a1d98c4cb2766de41c34fd08875.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is 1.5KE91CAH's listed type and grade?","answer":"The type is Zener (bidirectional TVS diode) and the grade is Automotive, backed by AEC-Q101 qualification for reliability in harsh environments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/taiwan-semiconductor-corporation/1.5KE91CAH","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/taiwan-semiconductor-corporation/1.5KE91CAH 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}}