{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T47CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T47CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T47CAY","factsUrl":"https://icboms.com/api/mcp/products/SM15T47CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T47CAY, Automotive AEC-Q101 TRANSIL™ bidirectional TVS diode, 1.5kW peak pulse power, 84V clamping, DO-214AB SMC, surface mount.","salesMarkdown":"## 1.5 kW bidirectional TVS for 40 V automotive rails The STMicroelectronics SM15T47CAY is a bidirectional Zener-type transient voltage suppressor from the SM15TY TRANSIL™ series, rated for 1.5 kW peak pulse power (10/1000 µs waveform) and qualified to AEC-Q101. It clamps transients to 84 V maximum at the rated peak pulse current of 119 A (8/20 µs waveform), with a reverse standoff voltage of 40.2 V and a minimum breakdown voltage of 44.7 V. The 84 V maximum clamping voltage at 119 A (8/20 µs) is the ceiling the downstream circuitry sees during a surge event. For a 40 V nominal rail, that leaves roughly 44 V of headroom to the typical 60 V or 80 V breakdown of downstream switching regulators or load switches. The 44.7 V minimum breakdown ensures the TVS does not conduct during normal operation on a 40.2 V standoff rail, but starts clamping before the rail exceeds the downstream device's absolute maximum. The 1.5 kW pulse rating means it can absorb a single 8/20 µs surge of that energy without failing short — a common requirement for automotive load-dump and ISO 7637-2 pulse coordination. ## AEC-Q101 and the automotive bill of materials For a buyer filling a BOM line, this part is specified into the automotive ECU or module without a near-term obsolescence risk. The SM15TY series is a standard ST product line, so second-source options from other AEC-Q101 TVS families exist (e.g., Littelfuse, Vishay, Onsemi) but pin-for-pin compatibility must be verified against the DO-214AB footprint and the specific breakdown voltage bin. ## Sourcing and quoting for production The DO-214AB package is a standard SMC footprint, compatible with common reflow profiles. The part is RoHS compliant per the TRANSIL series designation.","metaTitle":"STMicroelectronics SM15T47CAY TVS Diode, 1.5kW","metaDescription":"ST SM15T47CAY bidirectional TVS diode, 1.5kW peak pulse power, 84V clamping, AEC-Q101 qualified. Active lifecycle.","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":"SM15T47","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"44.7V","Voltage - Clamping (Max) @ Ipp":"84V","Voltage - Reverse Standoff (Typ)":"40.2V","Current - Peak Pulse (10/1000µs)":"119A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4387","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SM15T47CAY/alternatives.json"},"ai":{"faq":[{"question":"Is SM15T47CAY RoHS compliant?","answer":"Yes, as part of the TRANSIL series it is RoHS compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T47CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T47CAY 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}}