{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T22AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T22AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T22AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T22AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T22AY automotive Zener TVS diode, 1500W peak pulse power, 18.8V reverse standoff, 39.3V clamping, AEC-Q101 qualified, DO-214AB SMC package, surface mount.","salesMarkdown":"The STMicroelectronics SM15T22AY is a 1500W peak pulse power Zener TVS diode designed for automotive transient protection. It is AEC-Q101 qualified, confirming its suitability for stress-prone environments like engine control units, transmission controllers, and body electronics where load-dump and inductive-load transients are a daily reality. The headline 1500W peak pulse power rating (10/1000µs waveform) is the number that decides whether this part survives a real-world transient or fails short. On a 24V automotive system, the 18.8V standoff means the diode stays out of conduction during normal operation, but when a load-dump or alternator field-decay event pushes the bus above 20.9V (the minimum breakdown voltage), the device starts conducting and holds the clamp at 39.3V maximum. The 254A peak pulse current rating (8/20µs waveform) tells you it can handle the high-current, short-duration spikes typical of ISO 7637-2 pulses without exceeding the junction temperature limit. ## Package and mounting — SMC footprint for production The SM15T22AY comes in the DO-214AB (SMC) package, a surface-mount body that fits standard reflow processes. The SMC footprint is larger than the smaller SMA/SMB packages, which helps with thermal dissipation during the surge event — the 1500W pulse generates heat that the package must sink into the PCB copper.","metaTitle":"SM15T22AY Zener TVS, 1500W, AEC-Q101, SMC","metaDescription":"STMicroelectronics SM15T22AY automotive Zener TVS diode. 1500W peak pulse power, 18.8V standoff, AEC-Q101 qualified, 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":"SM15T22","Operating Temperature":"-40°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"20.9V","Voltage - Clamping (Max) @ Ipp":"39.3V","Voltage - Reverse Standoff (Typ)":"18.8V","Current - Peak Pulse (10/1000µs)":"254A (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 SM15T22AY AEC-Q101 qualified?","answer":"Yes, the SM15T22AY is AEC-Q101 qualified, which means it has passed the automotive-grade stress tests for reliability in under-hood and chassis-mounted applications."},{"question":"Can SM15T22AY be used for 24V automotive systems?","answer":"Yes. With a reverse standoff voltage of 18.8V and a minimum breakdown voltage of 20.9V, the SM15T22AY is designed to protect 24V nominal automotive rails. It clamps at 39.3V maximum under surge, which keeps downstream electronics within their safe operating area during load-dump and other transients."},{"question":"What is the difference between SM15T22AY and SM15T22A?","answer":"The 'Y' suffix on SM15T22AY indicates the automotive-grade (AEC-Q101) qualified version, while the base SM15T22A is the commercial/industrial variant without that qualification. The electrical characteristics — 1500W peak pulse, 18.8V standoff, 39.3V clamping — are identical between the two."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T22AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T22AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:42:52.752Z","lastPublished":"2026-07-16T15:42:52.752Z","indexable":true}}