{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1AHE3_A/D","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE9.1AHE3_A-D","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1AHE3_A-D","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1AHE3_A%2FD","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor, TransZorb® series, automotive TVS diode, 1.5KE9.1AHE3_A/D, 1500W peak pulse, 7.78V standoff, unidirectional, DO-201AA axial, AEC-Q101.","salesMarkdown":"## 1500 W clamping envelope for 12 V automotive rails The 1.5KE9.1AHE3_A/D: That standoff sits just above a nominal 12 V battery rail's steady-state tolerance — the diode stays dark during normal operation and only clamps when a transient pushes the line above 8.65 V breakdown, holding the clamp at 13.4 V maximum. For a 12 V system that sees load-dump or inductive kickback, this keeps the protected downstream silicon inside its abs-max rating. ## AEC-Q101 and the -55 to 175 °C operating band The DO-201AA axial through-hole package (also listed as DO-27) is a standard footprint; replacement or rework in a production board or field repair takes a soldering iron, not a hot-air station. At the 10/1000 µs test waveform, the 1.5KE9.1AHE3_A/D handles a peak pulse current of 112 A. That is the current the diode shunts to ground during the clamp event — the 13.4 V clamping voltage times 112 A equals the 1500 W rating. For a real-world transient like a 12 V battery disconnect with an alternator still spinning, the diode absorbs the energy pulse and resets; it is not a crowbar device and does not latch. The 'Power Line Protection: No' flag in the spec means this TVS is designed for signal or low-impedance rail clamping, not for continuous overvoltage ride-through on a power bus.","metaTitle":"Vishay 1.5KE9.1AHE3_A/D TVS, 1500W, 7.78V Standoff, AEC-Q101","metaDescription":"Vishay 1.5KE9.1AHE3_A/D automotive TVS diode, 1500W peak pulse, 7.78V standoff, AEC-Q101 qualified. Active production — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Vishay General Semiconductor - Diodes Division","Type":"Zener","Series":"Automotive, AEC-Q101, TransZorb®","Package":"Tape & Box (TB)","Applications":"Automotive","Mounting Type":"Through Hole","Package / Case":"DO-201AA, DO-27, Axial","Product Status":"Active","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","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","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":"$0.5346","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 1.5KE9.1AHE3_A/D in this Circuit Protection family?","answer":"The base product number is 1.5KE9.1, so any variant sharing that base (e.g., 1.5KE9.1A, 1.5KE9.1CA) with the same DO-201AA/DO-27 axial package is footprint-compatible. The AHE3 suffix specifically designates the AEC-Q101 automotive grade with the Tape & Box packaging. A non-automotive 1.5KE9.1A in the same package is a functional drop-in for non-automotive BOMs, but it lacks the AEC-Q101 qualification paperwork."},{"question":"What compliance documentation does Vishay provide for 1.5KE9.1AHE3_A/D?","answer":"As an AEC-Q101 qualified part, Vishay provides the standard automotive-grade documentation: PPAP (Production Part Approval Process) data upon request, RoHS compliance declaration, and REACH SVHC disclosure. The TransZorb® series carries Vishay's standard material compliance set."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1AHE3_A-D","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/1.5KE9.1AHE3_A-D 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}}