{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T15CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T15CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T15CAY","factsUrl":"https://icboms.com/api/mcp/products/SM15T15CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T15CAY, Automotive AEC-Q101, TRANSIL™, Bidirectional Zener TVS Diode, 1500W Peak Pulse Power, 12.8V Standoff, 27.2V Clamp, DO-214AB (SMC), Surface Mount.","salesMarkdown":"## 1500 W bidirectional TVS for automotive transient protection The SM15T15CAY: Bidirectional Zener TVS diode, 1500 W peak pulse power, AEC-Q101 qualified for automotive. ## What the 1500 W rating means for your rail protection The 1500 W peak pulse power rating (10/1000 µs) defines the energy the TVS can absorb in a single surge event without failing. For a 12.8 V standoff part, that translates to roughly 55 A peak pulse current on the longer waveform — enough to handle load-dump transients from an alternator or inductive kick from a relay coil. The 27.2 V clamp voltage is the ceiling the downstream circuitry must survive; a 12 V ECU rail with 30 V-rated input capacitors has comfortable margin. The 368 A rating on the 8/20 µs waveform is the more relevant spec for lightning surge or ESD events — it confirms the die can handle a very high current for a short duration without melting the junction. ## AEC-Q101 and the 150°C junction — automotive deployment context AEC-Q101 qualification passes stress tests required by Tier-1 automotive suppliers. 150°C maximum junction temperature allows placement near hot engine blocks without derating. For a production BOM, this removes the obsolescence risk that often plagues older TVS families.","metaTitle":"STMicroelectronics SM15T15CAY TVS Diode, 1500W","metaDescription":"STMicroelectronics SM15T15CAY bidirectional Zener TVS diode, 1500W peak pulse power, 12.8V standoff, 27.2V clamp, AEC-Q101 qualified for automotive.","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":"SM15T15","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"14.3V","Voltage - Clamping (Max) @ Ipp":"27.2V","Voltage - Reverse Standoff (Typ)":"12.8V","Current - Peak Pulse (10/1000µs)":"368A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5568","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM15T15CAY AEC-Q101 qualified?","answer":"Yes, the SM15T15CAY is part of the Automotive, AEC-Q101 qualified SM15TY series from STMicroelectronics, making it suitable for automotive under-hood and chassis-domain applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T15CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T15CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:43:03.037Z","lastPublished":"2026-07-16T15:43:03.037Z","indexable":true}}