{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM4T7V6AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM4T7V6AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM4T7V6AY","factsUrl":"https://icboms.com/api/mcp/products/SM4T7V6AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM4T7V6AY, Automotive AEC-Q101 SM4TY TRANSIL™ TVS diode, 400W peak pulse power, 6.5V standoff, 14.5V clamp, unidirectional, DO-214AC SMA, -55 to 150°C.","salesMarkdown":"The STMicroelectronics SM4T7V6AY is a unidirectional TRANSIL™ TVS diode from the automotive-grade SM4TY series, rated for 400W peak pulse power (10/1000µs waveform) and AEC-Q101 qualified. It clamps transients on a 6.5V nominal rail (reverse standoff) with a breakdown minimum of 7.2V and a maximum clamping voltage of 14.5V at the rated peak pulse current of 160A (8/20µs). ## Voltage thresholds and protection margin The 6.5V standoff voltage means the diode is effectively an open circuit below that level, drawing negligible leakage. Breakdown starts at 7.2V minimum, so a 5V or 3.3V logic rail is safe — the diode only conducts when a transient pushes the line above 7.2V. The 14.5V clamp is the maximum voltage the protected circuit sees during a surge; for a 5V-powered microcontroller or CAN transceiver, that clamp leaves enough headroom to avoid latch-up or oxide stress if the board layout keeps the TVS close to the protected pin. ## Package and mounting AEC-Q101 qualification means this part has passed the full automotive stress suite — high-temperature reverse bias, temperature cycling, and humidity — so it is rated for the reliability demands of an ECU, ADAS sensor, or body controller. The DO-214AC (SMA) package is a two-lead SOD-123-like body with a visible cathode band; it reflows cleanly with a standard lead-free profile and is easy to hand-replace with hot air if a board comes back for rework. No power line protection — this is a signal or low-power rail protector, not a mains-side suppressor.","metaTitle":"SM4T7V6AY STMicroelectronics Automotive TVS Diode, 400W","metaDescription":"STMicroelectronics SM4T7V6AY automotive AEC-Q101 TVS diode, 400W peak pulse power, 6.5V standoff, 14.5V clamp, DO-214AC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"Automotive, AEC-Q101, SM4TY, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"400W","Base Product Number":"SM4T7","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMA (DO-214AC)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"7.2V","Voltage - Clamping (Max) @ Ipp":"14.5V","Voltage - Reverse Standoff (Typ)":"6.5V","Current - Peak Pulse (10/1000µs)":"160A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2053","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/45721247f0377ca5ff3983c35eddc2fa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the peak pulse power of SM4T7V6AY?","answer":"The SM4T7V6AY is rated for 400W peak pulse power on a 10/1000µs waveform, which is the standard TVS rating for protecting automotive 6.5V rails against load-dump and inductive-load transients."},{"question":"Is SM4T7V6AY a replacement for SM4T7V5A?","answer":"The SM4T7V6AY is a different voltage variant within the same SM4T family. The SM4T7V5A has a lower standoff voltage (5V) and breakdown threshold; verify the rail voltage of your design before substituting — the 6.5V standoff of the V6AY may not trigger on a 5V rail that needs a lower clamp."},{"question":"Does SM4T7V6AY have AEC-Q101 qualification?","answer":"Yes, the SM4T7V6AY is AEC-Q101 qualified as part of the Automotive SM4TY series, making it suitable for automotive-grade designs requiring documented reliability."},{"question":"Is SM4T7V6AY unidirectional or bidirectional?","answer":"The SM4T7V6AY is a unidirectional TVS diode with one anode and one cathode — it protects against positive transients only. For bidirectional protection on AC or bipolar signal lines, a different part in the SM4T family would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM4T7V6AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM4T7V6AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:50:08.374Z","lastPublished":"2026-07-16T14:50:08.374Z","indexable":true}}