{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM6T56CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM6T56CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM6T56CAY","factsUrl":"https://icboms.com/api/mcp/products/SM6T56CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM6T56CAY, TRANSIL™ series, Zener TVS diode, bidirectional, 600W peak pulse power, 47.6V reverse standoff, 53.2V min breakdown, 100V clamping, DO-214AA SMB, AEC-Q101 automotive qualified.","salesMarkdown":"## 600W bidirectional TVS for automotive rails With a reverse standoff voltage of 47.6V and a minimum breakdown voltage of 53.2V, this bidirectional device clamps transients to a maximum of 100V at the peak pulse current of 40A (8/20µs waveform). The single bidirectional channel protects against both positive and negative surges on a single line. ## AEC-Q101 and the operating envelope ## Clamping voltage and rail selection The 47.6V reverse standoff is the maximum DC voltage the TVS will not conduct at — it sits comfortably above a 24V nominal automotive rail (which can transient to 36V during load dump) but is too high for a 12V system (typically 13.8V nominal, with transients to 26V). For 12V rails, a lower-voltage TVS in the same family would be the correct fit. This must stay below the absolute maximum rating of the downstream ICs — a 60V-rated MOSFET would be at risk, while a 100V-rated device has margin. On the rework bench, it is straightforward to remove with hot air and replace without lifting pads — the body is large enough to grip with tweezers, and the two terminals are clearly marked for polarity (though bidirectional means no orientation concern).","metaTitle":"STMicroelectronics SM6T56CAY TVS Diode, 600W Bidirectional","metaDescription":"STMicroelectronics SM6T56CAY Zener TVS diode, 600W peak pulse power, bidirectional, AEC-Q101 qualified for automotive. 47.6V reverse standoff, 100V clamping.","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, SM6TY, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"600W","Base Product Number":"SM6T56","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMB (DO-214AA)","Voltage - Breakdown (Min)":"53.2V","Voltage - Clamping (Max) @ Ipp":"100V","Voltage - Reverse Standoff (Typ)":"47.6V","Current - Peak Pulse (10/1000µs)":"40A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3a95ac6513bab2f04fd61565540cbe6f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SM6T56CAY/alternatives.json"},"ai":{"faq":[{"question":"Can SM6T56CAY be used for 24V automotive systems?","answer":"Yes, the 47.6V reverse standoff voltage is well above the 24V nominal rail and handles load-dump transients up to 36V without conducting. The 100V clamping voltage provides adequate protection for downstream components rated above 100V. For 12V systems, a lower-voltage TVS in the same family would be needed."},{"question":"What is the difference between SM6T56CAY and SM6T56A?","answer":"The SM6T56CAY is a bidirectional device (single channel protects both polarities), while the SM6T56A is the unidirectional version. Both share the same 600W peak pulse power, 47.6V standoff, and DO-214AA package. Choose the CAY suffix for AC-coupled or differential signal lines where polarity is not fixed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM6T56CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM6T56CAY 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}}