{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T15AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T15AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T15AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T15AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T15AY, Automotive Zener TVS, 1500W Peak Pulse, 12.8V Reverse Standoff, 27.2V Clamp, Unidirectional, SMC, AEC-Q101.","salesMarkdown":"## 1500W automotive transient suppressor The STMicroelectronics SM15T15AY is a unidirectional Zener TVS diode rated for 1500W peak pulse power, designed to clamp transients on 12V automotive power rails. It offers a 12.8V reverse standoff voltage, a minimum breakdown of 14.3V, and a maximum clamping voltage of 27.2V at the peak pulse current of 368A (8/20µs waveform). ## Clamp voltage and rail protection The 27.2V clamp voltage at 368A peak pulse current is the key parameter for verifying that downstream 40V-rated DC-DC converters or ASICs survive a load-dump event. With a 12.8V standoff, this part sits on a nominal 12V battery line without conducting leakage in normal operation. The 14.3V minimum breakdown provides a guard band against sustained overvoltage from an alternator regulator failure. ## AEC-Q101 and the automotive BOM AEC-Q101 qualification means the SM15T15AY has passed the automotive-grade stress tests: high-temperature reverse bias, temperature cycling, and humidity. This is the baseline for any Tier-1 or OEM BOM that requires PPAP-level documentation. ## SMC package and board fit Housed in the DO-214AB (SMC) package, this surface-mount TVS offers a compact footprint for automated assembly. The SMC body handles the 1500W pulse without requiring a heatsink, relying on the PCB copper pour for thermal dissipation. The package is compatible with standard reflow profiles; MSL rating should be verified from the label for bake requirements before reflow.","metaTitle":"STMicroelectronics SM15T15AY TVS Diode, 1500W, AEC-Q101, SMC","metaDescription":"STMicroelectronics SM15T15AY automotive TVS Zener diode: 1500W peak pulse, 12.8V standoff, 27.2V clamp, AEC-Q101, SMC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Grade":"Automotive","Series":"*","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"-","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","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","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","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":"$1.0000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the SM15T15AY suitable for automotive applications?","answer":"Yes. The SM15T15AY carries AEC-Q101 qualification and an automotive grade designation, making it suitable for under-hood and chassis-domain transient protection in 12V automotive systems."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T15AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T15AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:29:12.511Z","lastPublished":"2026-07-16T14:29:12.511Z","indexable":true}}