{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM6T15CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM6T15CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM6T15CAY","factsUrl":"https://icboms.com/api/mcp/products/SM6T15CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM6T15CAY, Automotive AEC-Q101 SM6TY TRANSIL™ TVS, bidirectional, 600W peak pulse, 12.8V standoff, 27.2V clamp, DO-214AA SMB package, -55°C to 150°C.","salesMarkdown":"The STMicroelectronics SM6T15CAY is a bidirectional Zener-based transient voltage suppressor (TVS) from the SM6TY series, built on the TRANSIL™ technology. It is AEC-Q101 qualified for automotive applications, meaning it meets the stress and reliability tests required for under-hood and chassis-domain electronics. The clamping voltage is held to 27.2V at the peak pulse current of 147A (8/20µs waveform), which keeps downstream 40V-rated silicon safe. ## 12V rail protection — the numbers that matter For a 12V automotive system, the key spec is the reverse standoff voltage of 12.8V — that is the maximum continuous DC voltage the TVS will not conduct at. The breakdown voltage (the point where it starts to avalanche) has a minimum of 14.3V, so it stays out of the way during normal battery voltage (up to ~14V during charging). When a surge hits, the clamping voltage maxes out at 27.2V, which is well below the typical 40V or 60V absolute maximum of most automotive-rated ICs and MOSFETs. The 600W peak pulse power rating (10/1000µs) covers the energy in a standard load-dump pulse per ISO 7637-2 pulse 5a/5b, though a higher-power TVS may be needed for severe load-dump conditions in heavy trucks. ## Package and field replacement It is a standard footprint you will find on many automotive ECU boards. For field service, it is a straightforward hot-air swap — no special orientation gotchas since it is bidirectional (both pins are identical). The package marking should be legible under magnification, but if the board is conformal-coated, plan on cleaning the area first. No lab bench needed; a hot-air station with a fine nozzle and some flux will get it done on site.","metaTitle":"STMicroelectronics SM6T15CAY TVS Diode, AEC-Q101, 600W","metaDescription":"ST SM6T15CAY bidirectional TVS, 12.8V standoff, 600W peak pulse, AEC-Q101 qualified for automotive.","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":"SM6T15","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)":"14.3V","Voltage - Clamping (Max) @ Ipp":"27.2V","Voltage - Reverse Standoff (Typ)":"12.8V","Current - Peak Pulse (10/1000µs)":"147A (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/SM6T15CAY/alternatives.json"},"ai":{"faq":[{"question":"Is SM6T15CAY AEC-Q101 qualified for automotive use?","answer":"Yes, it is AEC-Q101 qualified, part of the Automotive SM6TY series."},{"question":"Can SM6T15CAY be used for 12V automotive systems?","answer":"Yes. The reverse standoff voltage of 12.8V is designed to protect 12V rails. It will not conduct during normal battery voltage (up to about 14V during charging), and it clamps surges to 27.2V, which is safe for most automotive-rated ICs."},{"question":"What is the peak pulse power rating of SM6T15CAY?","answer":"600W for a 10/1000µs waveform. That covers standard automotive load-dump pulses per ISO 7637-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM6T15CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM6T15CAY 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}}