{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91AHE3_A/H","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91AHE3_A-H","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHE3_A-H","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHE3_A%2FH","rawCanonicalId":null},"summary":{"shortDescription":"Vishay 1.5SMC91AHE3_A/H, TransZorb series unidirectional TVS diode, 1.5 kW peak pulse, 86.5 V min breakdown, 125 V clamping @ 12 A, AEC-Q101 automotive, DO-214AB SMC, Tape & Reel.","salesMarkdown":"## Protection threshold — what the standoff and clamping voltages mean The 1.5SMC91AHE3_A/H: The 1.5 kW peak pulse rating makes this part the primary overvoltage clamp on a 77.8 V rail — a transient that exceeds the 86.5 V breakdown threshold causes the TVS to crowbar, limiting the clamped voltage at the protected node to 125 V maximum. The 77.8 V reverse standoff is the working voltage where the TVS stays off during normal operation — it is not a breakdown or a protection threshold, it is the ceiling for clean rail conditions. ## Automotive qualification and temperature margin AEC-Q101 places this in the automotive discrete semiconductor qualification flow — temperature cycling, humidity bias, and surge stress are screened to the grade level that automotive ECU suppliers require before sign-off. ## Package and polarity for board assembly The DO-214AB (SMCJ) package is the standard pick-and-place compatible outline for this series — the cathode stripe marks polarity on the unidirectional device, and the pad layout must match the polarity for the clamp to function in the correct direction. Tape & Reel packaging supports high-volume assembly runs without tray handling.","metaTitle":"Vishay 1.5SMC91AHE3_A/H, 1.5 kW TVS Diode, 86.5 V","metaDescription":"Vishay 1.5SMC91AHE3_A/H unidirectional TVS diode, 1.5 kW peak pulse, 86.5 V min breakdown, 125 V clamping, AEC-Q101 automotive grade, DO-214AB SMC.","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","Grade":"Automotive","Series":"1.5SMC, TransZorb®","Packaging":"Tape & Reel (TR)","Part Status":"Active","Applications":"-","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"DO-214AB, SMC","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"1.5SMC91","Operating Temperature":"-65°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"DO-214AB (SMCJ)","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":"$0.3630","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHE3_A%2FH/alternatives.json"},"ai":{"faq":[{"question":"Is this part a Zener diode or a TVS?","answer":"The listed type field reads Zener, but the series name TransZorb and the peak pulse power rating of 1.5 kW identify this as a unidirectional TVS (Transient Voltage Suppressor) — the Zener designation covers the clamping mechanism while the peak pulse spec defines the surge-handling capability that distinguishes it from a standard Zener regulator."},{"question":"Does 1.5SMC91AHE3_A/H carry AEC-Q101 automotive qualification?","answer":"Yes — AEC-Q101 is listed as the qualification standard, placing this in the automotive-screened grade for discrete semiconductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHE3_A-H","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/1.5SMC91AHE3_A-H 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}}