{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T12CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T12CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T12CAY","factsUrl":"https://icboms.com/api/mcp/products/SM15T12CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T12CAY, Automotive AEC-Q101 TRANSIL™ Zener TVS diode, 1500W peak pulse power, 10.2V reverse standoff, 21.7V clamping, bidirectional, single channel, DO-214AB SMC package, surface mount, -40°C to 150°C junction temperature.","salesMarkdown":"## 1500W automotive-grade transient suppressor — still in active production The STMicroelectronics SM15T12CAY is a single-channel bidirectional Zener TVS diode from the SM15TY TRANSIL™ series, qualified to AEC-Q101 for automotive applications. It delivers 1500W peak pulse power (10/1000µs waveform) with a reverse standoff voltage of 10.2V and clamping at 21.7V at the peak pulse current of 461A (8/20µs). ## Bidirectional protection — one part for both polarities With a single bidirectional channel, the SM15T12CAY clamps transients of either polarity using one device. This simplifies the BOM for AC-coupled signal lines, bipolar power rails, or any circuit where the surge can swing positive or negative relative to ground. No need to series two unidirectional diodes — the bidirectional Zener structure handles both halves of the waveform in a single DO-214AB footprint. ## AEC-Q101 qualification and active lifecycle Its AEC-Q101 qualification means it has passed the automotive-grade stress tests (high-temperature reverse bias, temperature cycling, humidity) required for OEM production programs. For MRO and spare-parts storerooms, this part is a safe long-term stock-keeping choice: no imminent obsolescence, and the DO-214AB package is a widely used industry standard for 1500W TVS diodes.","metaTitle":"STMicroelectronics SM15T12CAY TVS Diode, 1500W","metaDescription":"STMicroelectronics SM15T12CAY automotive AEC-Q101 Zener TVS diode. 1500W peak pulse power, 10.2V standoff, bidirectional, DO-214AB SMC package.","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, SM15TY, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"SM15T12","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"11.4V","Voltage - Clamping (Max) @ Ipp":"21.7V","Voltage - Reverse Standoff (Typ)":"10.2V","Current - Peak Pulse (10/1000µs)":"461A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the peak pulse power of SM15T12CAY?","answer":"The SM15T12CAY is rated for 1500W peak pulse power (1.5kW) under a 10/1000µs waveform. This is the maximum power the device can dissipate during a single transient event before the junction temperature exceeds the rated limit."},{"question":"Is SM15T12CAY bidirectional?","answer":"Yes, the SM15T12CAY has a single bidirectional channel. It clamps transients of both positive and negative polarity, making it suitable for AC-coupled or bipolar rails without needing two unidirectional devices."},{"question":"Is SM15T12CAY AEC-Q101 qualified?","answer":"Yes, the SM15T12CAY is AEC-Q101 qualified as part of the Automotive SM15TY series. This qualification covers the stress tests required for automotive-grade semiconductor devices used in under-hood and chassis applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T12CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T12CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:03:35.613Z","lastPublished":"2026-07-16T15:03:35.613Z","indexable":true}}