{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T12A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T12A","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T12A","factsUrl":"https://icboms.com/api/mcp/products/SM15T12A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T12A, TRANSIL™ series, Zener, 1 channel, DO-214AB SMC, 1500W peak pulse, 10.2V standoff, 21.7V clamp, -55°C to 150°C.","salesMarkdown":"The STMicroelectronics SM15T12A is a unidirectional Zener-type TRANSIL™ TVS diode in a DO-214AB (SMC) surface-mount package. It is designed to clamp voltage transients on a 10.2 V DC rail, with a minimum breakdown voltage of 11.4 V and a maximum clamping voltage of 21.7 V at the rated peak pulse current of 461 A (8/20 µs waveform). The 1500 W peak pulse power rating (1.5 kW) defines its ability to absorb surge energy from events like inductive load switching or lightning-induced transients without failing. ## Package and footprint The SM15T12A is supplied in a DO-214AB (SMC) package, a standard surface-mount outline for medium-power TVS diodes. The SMC body measures approximately 7.1 mm x 6.2 mm with a 2.6 mm height, and the gull-wing leads provide a solder joint that can be inspected visually. The footprint matches the industry-standard SMC land pattern — no special pad geometry needed. The part is rated for a continuous operating junction temperature of 150°C, so the PCB layout should include adequate copper area on the cathode tab to dissipate heat from repetitive surge events. ## Active status and sourcing posture For volume or scheduled deliveries, an RFQ will return a firm price and lead time based on the requested quantity and date-code requirements.","metaTitle":"STMicroelectronics SM15T12A TVS Diode, 1500W, DO-214AB (SMC)","metaDescription":"STMicroelectronics SM15T12A TRANSIL™ Zener TVS diode. 1500W peak pulse power, 10.2V standoff, 21.7V clamp. DO-214AB SMC. Active.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SM15T, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","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":"SM15T12","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"11.4V","Voltage - Clamping (Max) @ Ipp":"21.7V","Voltage - Reverse Standoff (Typ)":"10.2V","Current - Peak Pulse (10/1000µs)":"461A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/539ce92ad6505c8a9d704773ec1ef151.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the SM15T12A available via RFQ confirmation?","answer":"The SM15T12A is available to order through independent distribution. Submit an RFQ for current availability and pricing — stock levels and lead times are confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to the SM15T12A?","answer":"Within the same SM15T TRANSIL™ family, the SM15T12A is the unidirectional 10.2 V standoff variant. Pin-compatible alternatives at different voltage ratings (e.g., SM15T10A for 8.55 V standoff, SM15T15A for 12.8 V standoff) share the same DO-214AB package and footprint, allowing a voltage-class change without a board layout revision."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T12A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T12A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:29:09.483Z","lastPublished":"2026-07-16T14:29:09.483Z","indexable":true}}