{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91HE3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE91HE3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91HE3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91HE3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb®, TVS Zener, 1.5KE91HE3/73, 1500W, 73.7V standoff, DO-201AA axial, through hole.","salesMarkdown":"## What this 1.5 kW TransZorb covers on the automotive bus The 1.5KE91HE3/73: It clamps a 73.7 V reverse standoff (the nominal operating voltage it leaves alone) to a maximum of 131 V at the 11.5 A peak pulse current (10/1000 µs waveform). The 1500 W peak pulse rating means it can absorb a single 10/1000 µs surge up to that power without failing — enough for load-dump or inductive kickback on a 48 V or 72 V nominal bus in an automotive ECU. Packaged in the DO-201AA (DO-27) axial-lead form, it is a through-hole part — the leads handle the surge current without the trace-width constraints of a surface-mount pad. The single unidirectional channel protects one rail per device. ## Lifecycle reality — obsolete, but still sourceable Vishay has marked the 1.5KE91HE3/73 as obsolete. The AEC-Q101 qualification means the parts in this lot were originally screened for automotive-grade reliability (temperature cycling, ESD, and PPAP documentation). If the design is locked to this Vishay part number, the qualification trace is intact as long as the supply chain provides genuine, un-reeled parts.","metaTitle":"1.5KE91HE3/73 Vishay TVS, 1.5kW, 73.7V Standoff, DO-201AA","metaDescription":"Vishay 1.5KE91HE3/73 TransZorb TVS, 1500W peak pulse, 73.7V reverse standoff, AEC-Q101 automotive. Obsolete — sourced per 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":"Automotive, AEC-Q101, TransZorb®","Package":"Tape & Box (TB)","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":"1.5KE91","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"81.9V","Voltage - Clamping (Max) @ Ipp":"131V","Voltage - Reverse Standoff (Typ)":"73.7V","Current - Peak Pulse (10/1000µs)":"11.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"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 1.5KE91HE3/73 in this Circuit Protection family?","answer":"No official pin-compatible successor is recorded for this Vishay order code. A functionally similar TVS with the same DO-201AA package and a 73.7 V reverse standoff would be a parametric cross, but the AEC-Q101 qualification and TransZorb construction are specific to this series. A board-level replacement requires reviewing the clamping voltage and peak pulse current against the application's surge requirements."},{"question":"What compliance documentation does Vishay General Semiconductor - Diodes Division provide for 1.5KE91HE3/73?","answer":"The part carries the AEC-Q101 automotive qualification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91HE3-73","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/1.5KE91HE3-73 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}}