{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE9.1HE3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE9.1HE3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1HE3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE9.1HE3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb® series, Zener TVS diode, 1.5KE9.1HE3/73, 1500W peak pulse, 7.37V standoff, DO-201AA axial-lead, Tape & Box.","salesMarkdown":"## 1500 W peak pulse, 7.37 V standoff — the clamping envelope for a 12 V automotive rail The 1.5KE9.1HE3/73: It clamps a 10/1000 µs surge at 13.8 V maximum while the reverse standoff voltage sits at 7.37 V — this puts the protection window squarely over a nominal 12 V battery line, where the standoff keeps the diode out of conduction during normal operation and the clamp catches load-dump or inductive kick transients before they reach downstream silicon. The breakdown voltage range starts at 8.19 V minimum, so the diode begins to avalanche well before the clamp voltage is reached — this built-in margin means the TVS absorbs the surge energy without the part itself failing open or short. ## DO-201AA axial-lead — board integration and thermal path Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE9.1HE3/73 is a through-hole part intended for point-to-point wiring or PCB mounting with the leads formed to the hole pitch. The package is supplied in Tape & Box (TB), which is a bulk axial-lead format — not reeled for automated insertion, but suitable for hand-loading or tube-fed assembly. No power line protection is built in; this is a signal-rail or low-voltage bus clamp, not a mains-side suppressor. ## Obsolete — sourcing through independent channels Vishay lists the 1.5KE9.1HE3/73 as obsolete. No pin-compatible direct replacement from Vishay is documented, so a BOM that requires this exact clamping voltage and package should be sourced as a last-time-buy or cross-referenced to a functionally equivalent TVS from another supplier with a similar standoff and clamp envelope.","metaTitle":"1.5KE9.1HE3/73 Vishay TVS, 1500W, 7.37V standoff, DO-201AA","metaDescription":"Vishay 1.5KE9.1HE3/73 Zener TVS, 1500W peak pulse, 7.37V standoff, AEC-Q101, obsolete. 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":"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":"1.5KE9.1","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"8.19V","Voltage - Clamping (Max) @ Ipp":"13.8V","Voltage - Reverse Standoff (Typ)":"7.37V","Current - Peak Pulse (10/1000µs)":"109A"}},"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 package does 1.5KE9.1HE3/73 come in?","answer":"It is in a DO-201AA (DO-27) axial-lead through-hole package, supplied in Tape & Box format."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE9.1HE3-73","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/1.5KE9.1HE3-73 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}}