{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T27AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T27AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T27AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T27AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T27AY, Zener TVS diode, Automotive grade, 1500W peak pulse power, 23.1V standoff, 25.7V breakdown, 48.3V clamp, 1 unidirectional channel, DO-214AB SMC, AEC-Q101, -40°C to 150°C.","salesMarkdown":"The SM15T27AY is a unidirectional Zener TVS diode from STMicroelectronics, rated for 1500W peak pulse power (10/1000µs waveform). The device protects a 23.1V nominal rail, with a minimum breakdown voltage of 25.7V and a clamping voltage of 48.3V at the peak pulse current of 207A (8/20µs). ## Voltage ratings — what they mean for rail protection The 23.1V reverse standoff voltage is the maximum continuous DC voltage the TVS can withstand without conducting. For a 24V nominal automotive bus (which can ride up to 28V during load dump or alternator surge), this part sits below the rail — the 25.7V minimum breakdown gives a narrow but workable margin. The 48.3V clamp is the voltage the protected circuit sees during a surge; downstream components must survive that peak for the pulse duration. ## Package and footprint Housed in a SMC package, surface-mount. The SMC body is larger than the smaller SMA/SMB siblings, sized to dissipate the 1500W pulse without exceeding the 150°C junction limit. ## Lifecycle and sourcing posture Listed as Active by STMicroelectronics. For production BOM lines requiring AEC-Q101 protection on a 24V nominal rail, this part is a current-design-in candidate.","metaTitle":"SM15T27AY TVS Diode, 1500W, AEC-Q101, DO-214AB SMC","metaDescription":"SM15T27AY Zener TVS diode from STMicroelectronics, 1500W peak pulse power, 23.1V standoff, AEC-Q101 qualified, 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","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":"SM15T27","Operating Temperature":"-40°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"25.7V","Voltage - Clamping (Max) @ Ipp":"48.3V","Voltage - Reverse Standoff (Typ)":"23.1V","Current - Peak Pulse (10/1000µs)":"207A (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 SM15T27AY automotive qualified (AEC-Q101)?","answer":"Yes, it carries AEC-Q101 qualification, making it suitable for automotive-grade applications including under-hood and chassis-domain protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T27AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T27AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:46:04.085Z","lastPublished":"2026-07-16T15:46:04.085Z","indexable":true}}