{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1.5SMC91A-Q","brand":"Bourns Inc.","brandSlug":"bourns-inc","productSlug":"1.5SMC91A-Q","canonicalUrl":"https://icboms.com/bourns-inc/1.5SMC91A-Q","factsUrl":"https://icboms.com/api/mcp/products/1.5SMC91A-Q","rawCanonicalId":null},"summary":{"shortDescription":"Bourns 1.5SMC91A-Q, Automotive AEC-Q101 unidirectional TVS Zener, 77.8V standoff, 86.5V min breakdown, 162.5V clamping @ 61A peak pulse, 1500W peak pulse power, DO-214AB SMC surface mount, -55°C to +150°C junction.","salesMarkdown":"## What the three-voltage spec actually tells you The 1.5SMC91A-Q: The 77.8V reverse standoff is the working rail the diode ignores — it sits off and draws only leakage current up to that level. That ~2.1:1 ratio between standoff and clamping is the let-through ceiling — tight enough for most 77V-rail protection targets in automotive and industrial DC distribution. ## Surge energy and peak pulse power The 61A peak pulse rating at the clamping voltage sets the surge current the diode survives without degradation per the AEC-Q101 test sequence; exceed that current and the clamping voltage rises above spec, so the board-level surge budget must stay within it. ## Automotive qualification and temperature grade The DO-214AB SMC package is the industry-standard TVS footprint; land pattern tolerance is forgiving and dual-source availability from multiple TVS manufacturers is strong for this case size.","metaTitle":"Bourns 1.5SMC91A-Q TVS Diode, 77.8V Standoff, 162.5V Clamp","metaDescription":"Bourns 1.5SMC91A-Q unidirectional TVS Zener, AEC-Q101 qualified, 1500W peak pulse at 10/1000µs. 77.8V standoff, 162.5V clamping. DO-214AB SMC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"Bourns Inc.","Type":"Zener","Series":"Automotive, AEC-Q101, 1.5SMC-Q","Package":"Tape & Reel (TR)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"unknown","Power - Peak Pulse":"1500W (1.5kW)","Operating Temperature":"-55°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":"162.5V","Voltage - Reverse Standoff (Typ)":"77.8V","Current - Peak Pulse (10/1000µs)":"61A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2805","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/976bc9a672fe6003b5ff6a7a78a85227.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What series and qualification does the 1.5SMC91A-Q carry?","answer":"It belongs to the 1.5SMC-Q series with AEC-Q101 automotive qualification — the suffix Q denotes automotive grade per Bourns convention. This is the series to cross-reference if you are sourcing an automotive-grade unidirectional TVS in the DO-214AB SMC package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/bourns-inc/1.5SMC91A-Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/bourns-inc/1.5SMC91A-Q 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}}