{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM4T15CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM4T15CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM4T15CAY","factsUrl":"https://icboms.com/api/mcp/products/SM4T15CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM4T15CAY, Automotive Grade, Bidirectional Zener TVS Diode, 400W Peak Pulse Power, 13V Reverse Standoff, 14.4V Breakdown Min, 27.2V Clamping, DO-214AC (SMA), -55°C to 150°C.","salesMarkdown":"The 13V reverse standoff voltage means it stays out of the way on a 12V nominal rail, and the 27.2V maximum clamping voltage limits the spike the downstream circuitry sees. ## AEC-Q101 and the automotive temperature range The AEC-Q101 qualification means the part has passed stress tests required for automotive modules. The -55°C to 150°C operating range covers cold-crank and heat soak. ## 400W peak pulse power — what it buys you The 400W peak pulse power rating is measured with an 8/20µs current waveform. This part can absorb a single 85A pulse (8/20µs) without failing. The SM4T15CAY comes in a surface-mount package common for TVS diodes in this power class. The package is small enough for dense PCB layouts.","metaTitle":"STMicroelectronics SM4T15CAY TVS Diode, 400W Bidirectional","metaDescription":"STMicroelectronics SM4T15CAY bidirectional Zener TVS diode, 400W peak pulse power, 13V standoff, AEC-Q101 qualified.","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-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"400W","Base Product Number":"SM4T15","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMA (DO-214AC)","Voltage - Breakdown (Min)":"14.4V","Voltage - Clamping (Max) @ Ipp":"27.2V","Voltage - Reverse Standoff (Typ)":"13V","Current - Peak Pulse (10/1000µs)":"85A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/45721247f0377ca5ff3983c35eddc2fa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM4T15CAY automotive qualified?","answer":"Yes, the SM4T15CAY is AEC-Q101 qualified, which means it has passed automotive-grade reliability testing for use in vehicle electronics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM4T15CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM4T15CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}