{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T10CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T10CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T10CAY","factsUrl":"https://icboms.com/api/mcp/products/SM15T10CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T10CAY, Automotive AEC-Q101 TRANSIL™ TVS, Zener, 1500W peak pulse, 8.55V reverse standoff, 18.6V clamping, DO-214AB SMC, -40°C to 150°C.","salesMarkdown":"## Automotive-grade transient suppressor for 12V rails The STMicroelectronics SM15T10CAY is a bidirectional Zener TVS diode from the SM15TY TRANSIL™ series, designed to clamp transients on automotive power buses. Rated for 1500W peak pulse power (10/1000µs waveform) with a reverse standoff voltage of 8.55V and a clamping voltage of 18.6V at 538A peak pulse current (8/20µs), it protects sensitive electronics like ECUs, sensors, and infotainment modules from load-dump, inductive kickback, and ESD events. The 1500W peak pulse power rating (10/1000µs) defines the energy the device can absorb in a single transient event before failure. For a 12V automotive rail, the 8.55V reverse standoff ensures the TVS does not conduct during normal operation, while the 18.6V clamping voltage limits the spike seen by downstream components. The 538A peak pulse current (8/20µs) confirms it can handle the high-energy surges typical of load-dump scenarios per ISO 7637-2 pulse 5a. This combination means the SM15T10CAY is sized for moderate-power bus protection — not the main alternator feed, but distribution nodes and module inputs where 1500W of clamping headroom is sufficient. ## Package and mounting — DO-214AB SMC The SM15T10CAY is housed in a DO-214AB (SMC) package, a surface-mount footprint common for medium-power TVS diodes. The SMC body handles the thermal dissipation of a 1500W pulse without requiring an external heatsink, relying on the PCB copper pour and solder joint for heat sinking. The package is compatible with standard reflow soldering profiles; verify the MSL rating on the reel label before opening the moisture barrier bag.","metaTitle":"STMicroelectronics SM15T10CAY TVS Diode, 1500W, AEC-Q101","metaDescription":"STMicroelectronics SM15T10CAY automotive TVS diode, 1500W peak pulse power, 8.55V reverse standoff, 18.6V clamping, 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","Series":"Automotive, AEC-Q101, SM15TY, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Automotive","Mounting Type":"Surface Mount","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"1500W (1.5kW)","Base Product Number":"SM15T10","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"9.5V","Voltage - Clamping (Max) @ Ipp":"18.6V","Voltage - Reverse Standoff (Typ)":"8.55V","Current - Peak Pulse (10/1000µs)":"538A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM15T10CAY RoHS compliant?","answer":"The SM15T10CAY is listed as RoHS compliant. The DO-214AB SMC package is lead-free and compatible with lead-free soldering processes."},{"question":"What is the difference between SM15T10CAY and SM15T10A?","answer":"The SM15T10CAY is a bidirectional TVS (one device protects both polarities), while the SM15T10A is a unidirectional version (cathode band). Both share the same 1500W peak pulse power, 8.55V reverse standoff, and 18.6V clamping voltage, but the bidirectional variant is typically used on AC-coupled or floating lines where the signal swings both positive and negative relative to ground."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T10CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T10CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:42:23.831Z","lastPublished":"2026-07-16T15:42:23.831Z","indexable":true}}