{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T10AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T10AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T10AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T10AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T10AY, Automotive AEC-Q101 TRANSIL™ TVS, Zener, 1500W peak pulse, 8.55V standoff, 18.6V clamp, 1 unidirectional channel, DO-214AB SMC, -40°C to 150°C.","salesMarkdown":"The STMicroelectronics SM15T10AY is a unidirectional Zener TVS diode from the SM15TY TRANSIL™ series, rated for 1500W peak pulse power (10/1000µs waveform) and packaged in a DO-214AB SMC for surface-mount assembly. With an 8.55V reverse standoff voltage, a minimum breakdown of 9.5V, and a clamping voltage of 18.6V at the peak pulse current, this part is sized to protect 12V automotive electronics from load-dump and inductive-load transients. The AEC-Q101 qualification and -40°C to 150°C operating junction temperature range make it suitable for under-hood and chassis-mounted modules where ambient temperatures exceed 85°C. ## Clamping voltage and standoff — the protection window The 8.55V standoff voltage means the SM15T10AY will not conduct appreciable leakage current on a nominal 12V bus that stays below that level. Once the line exceeds 9.5V (the breakdown threshold), the device begins to avalanche, clamping the transient to 18.6V maximum. For a typical 12V automotive system that must survive 24V jump-starts and 40V load-dump, the 18.6V clamp is aggressive enough to keep downstream electronics within their absolute-maximum ratings. The 538A peak pulse current rating (8/20µs) gives the designer headroom for high-energy surges from alternator field decay or relay coil kickback. For automotive programs with multi-year production runs, this is a clean sourcing entry — no need to qualify a second source for lifecycle reasons alone. The base product number is SM15T10, so the 'AY' suffix denotes the AEC-Q101 automotive grade and the specific packaging (likely tape-and-reel). ## Package and mounting — DO-214AB SMC footprint The SMC body provides adequate copper area for heat sinking during the pulse — the 1500W rating assumes the PCB copper lands can sink the transient energy. No exposed pad; the cathode band and unidirectional marking are per the JEDEC standard.","metaTitle":"STMicroelectronics SM15T10AY TVS Diode, 1500W, AEC-Q101","metaDescription":"STMicroelectronics SM15T10AY automotive TVS Zener diode, 1500W peak pulse power, 8.55V standoff, 18.6V clamp, AEC-Q101, DO-214AB SMC. 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":"SM15T10","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","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 SM15T10AY RoHS compliant and AEC-Q101 qualified?","answer":"Yes, the SM15T10AY is part of the Automotive, AEC-Q101 qualified SM15TY TRANSIL™ series, which means it meets the AEC-Q101 stress test qualification for automotive-grade discrete semiconductors. RoHS compliance is standard for ST's current production TRANSIL parts, though the specific RoHS status should be verified against the latest ST datasheet or certificate of compliance for the date code received."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T10AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T10AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:46:09.923Z","lastPublished":"2026-07-16T15:46:09.923Z","indexable":true}}