{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5KE91A-E3/73","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5KE91A-E3-73","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91A-E3-73","factsUrl":"https://icboms.com/api/mcp/products/1.5KE91A-E3%2F73","rawCanonicalId":null},"summary":{"shortDescription":"Vishay General Semiconductor - Diodes Division TransZorb® TVS, Zener type, 1.5KE91A-/73, 1500W peak pulse, 77.8V reverse standoff, 125V clamp, DO-201AA axial, Tape & Box.","salesMarkdown":"The 1.5KE91A-E3/73: That 1.5 kW rating means it can absorb a 12 A transient and clamp it to 125 V without failing, provided the pulse duration stays within the 1 ms window. For a 24 V or 48 V DC bus with a 77.8 V reverse standoff, this part sits below the rail's normal operating peak and only conducts during an overvoltage event. ## Breakdown window and clamping ceiling Breakdown is specified at 86.5 V minimum, with the reverse standoff at 77.8 V — a 8.7 V margin between the maximum continuous voltage and the point where the device starts conducting. That guard band keeps the TVS out of the circuit during normal ripple and line regulation. A downstream DC-DC converter with a 100 V abs-max input would need additional protection; one rated for 150 V has comfortable margin. ## Through-hole package and temperature range The DO-201AA axial-lead package is a through-hole format that handles the thermal cycling of the 1500 W pulse by sinking heat into the PCB copper and the lead wire itself. The Tape & Box packaging is a standard reel-alternative format for axial parts, common in through-hole assembly lines that feed from a tube or box rather than a tape reel.","metaTitle":"1.5KE91A-E3/73 TransZorb TVS, 1500W, 77.8V Standoff","metaDescription":"Vishay 1.5KE91A-E3/73 unidirectional TVS, 1500W peak pulse, 77.8V standoff, 125V clamp. Active production. Sourced per RFQ through independent distribution.","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":"TransZorb®","Package":"Tape & Box (TB)","Applications":"General Purpose","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":"1.5KE91","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"1.5KE","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"86.5V","Voltage - Clamping (Max) @ Ipp":"125V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"12A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3465","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cbd949ebcf4c95d5b4ea8fdecf87536f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the 1.5KE91A-/73 and what is the lead time?","answer":"The 1.5KE91A-/73 is an active Vishay part sourced through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5KE91A-E3-73","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/1.5KE91A-E3-73 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}}