{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T27A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T27A","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T27A","factsUrl":"https://icboms.com/api/mcp/products/SM15T27A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T27A, TRANSIL™ series, TVS Zener diode, 1500W peak pulse power, 23.1V reverse standoff, 48.3V clamp, 207A peak pulse current, DO-214AB (SMC) surface mount, -55°C to 150°C.","salesMarkdown":"## 1500W peak pulse — the surge budget for a 24V rail The STMicroelectronics SM15T27A is a 1500W TRANSIL™ TVS diode in a DO-214AB (SMC) surface-mount package. It is designed to clamp transients on a nominal 24V DC bus, with a reverse standoff voltage of 23.1V and a maximum clamping voltage of 48.3V at the peak pulse current of 207A (8/20 µs waveform). ## Voltage window — standoff, breakdown, clamp The reverse standoff voltage of 23.1V means the diode does not conduct at the normal 24V rail level, leaving the line undisturbed. Breakdown occurs at a minimum of 25.7V, and the clamping voltage is capped at 48.3V — this window ensures the protected circuit sees a transient clamped below 50V even under the full 1500W surge. The unidirectional channel is polarity-sensitive: it protects only one rail orientation, so the cathode must face the positive line.","metaTitle":"STMicroelectronics SM15T27A TVS Diode, 1500W, DO-214AB","metaDescription":"STMicroelectronics SM15T27A TRANSIL™ TVS diode, 1500W peak pulse, 23.1V standoff, 48.3V clamp. Active production, SMC package. Available to order.","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":"SM15T27","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"25.7V","Voltage - Clamping (Max) @ Ipp":"48.3V","Voltage - Reverse Standoff (Typ)":"23.1V","Current - Peak Pulse (10/1000µs)":"207A (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":"Can SM15T27A be used for 24V system protection?","answer":"Yes. The reverse standoff voltage of 23.1V sits just below a nominal 24V rail, so the diode does not conduct during normal operation. The breakdown triggers at 25.7V min, and clamping is limited to 48.3V, providing a safe window for 24V DC bus transient protection."},{"question":"Is SM15T27A RoHS compliant?","answer":"The part is listed as RoHS compliant per the manufacturer's documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T27A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T27A when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T16:25:03.970Z","lastPublished":"2026-07-16T16:25:03.970Z","indexable":true}}