{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91AHM3_A/I","brand":"Vishay General Semiconductor - Diodes Division","brandSlug":"vishay-general-semiconductor-diodes-division","productSlug":"1.5SMC91AHM3_A-I","canonicalUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHM3_A-I","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHM3_A%2FI","rawCanonicalId":null},"summary":{"shortDescription":"Vishay 1.5SMC TransZorb® automotive TVS diode, 1.5SMC91AHM3_A/I, DO-214AB SMC, 1500W peak pulse, 77.8V standoff, 12A peak pulse current.","salesMarkdown":"## Protection window: standoff through clamping The 1.5SMC91AHM3_A/I: The 77.8V reverse standoff defines the working voltage — the line sits below this without the device conducting. That 125V ceiling is the clamping limit the downstream circuit must survive — it is not a target, it is the hard stop. For a 48V telecom bus, the 77.8V standoff gives adequate headroom above the nominal rail and the 125V clamp sits below the common-mode withstand rating of most PHY interfaces. ## AEC-Q101 automotive grade AEC-Q101 qualification means the die and package passed the automotive stress suite — temperature cycling, high-temperature reverse bias, power temperature cycling, and surge life testing. For telecom hardware that also sees outdoor or transport deployment, this grade raises the confidence floor over a commercial-spec TVS that only passes JEDEC room-condition testing. Junction temperature rating is -65°C to 150°C — the wide cold end matters for outdoor cabinet equipment that sits unpowered in freezing climates before startup. The 150°C ceiling is the die limit; the board-level thermal design still needs to keep the case below the derating curve at the worst-case ambient. ## Sourcing posture — active part, quoted to order Listed Active under Vishay General Semiconductor — Diodes Division. This is not a NRND or EOL item, so no last-time-buy window applies.","metaTitle":"Vishay 1.5SMC91AHM3_A/I TVS Diode, 1500W, 77.8V","metaDescription":"Vishay 1.5SMC91AHM3_A/I — AEC-Q101 automotive Zener TVS in DO-214AB SMC. 77.8V standoff, 86.5V min breakdown, 125V clamping at 12A peak pulse.","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":"Telecom","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 (SMC)","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":"$0.3331","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/de7dd597f6fdc3f56660f78f3e5a960d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/1.5SMC91AHM3_A%2FI/alternatives.json"},"ai":{"faq":[{"question":"What is the 1.5SMC91AHM3_A/I used for?","answer":"It is a unidirectional Zener TVS in the 1.5SMC TransZorb series, designed to clamp voltage transients on telecom signal lines. The 77.8V standoff, 86.5V breakdown, and 125V clamping ceiling map to 48V telecom bus overvoltage protection — the AEC-Q101 grade also makes it suitable for automotive electronics modules that require telecom-adjacent transient immunity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/vishay-general-semiconductor-diodes-division/1.5SMC91AHM3_A-I","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/1.5SMC91AHM3_A-I 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}}