{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T33AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T33AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T33AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T33AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T33AY, Automotive AEC-Q101 TRANSIL™ TVS diode, 1500W peak pulse power, 28.2V standoff, 59V clamping, unidirectional, DO-214AB SMC package, -40°C to 150°C.","salesMarkdown":"## 1500W peak pulse power — clamping a 28.2V rail Its 1500W peak pulse power (10/1000µs waveform) handles the kind of load-dump and inductive-kick transients common on 24V nominal vehicle power buses, where the 28.2V reverse standoff voltage leaves margin for steady-state rail variations without conducting. The 59V maximum clamping at 169A peak pulse current defines the upper voltage the downstream electronics see during a surge — a critical number for selecting DC-DC converters and linear regulators that must survive the event. At 150°C junction, derate the peak pulse power per the datasheet's thermal impedance curve — the 1500W rating is at 25°C, and available power drops linearly above that. For a 24V truck or heavy-equipment rail, the 28.2V standoff gives about 15% headroom above nominal, which is enough to avoid false triggering from normal ripple while still clamping before the downstream DC-DC's absolute maximum input. The SMC body handles the 1500W pulse without requiring through-hole leads, which keeps the assembly compatible with reflow soldering. Watch the PCB copper area for thermal dissipation — the pulse rating assumes a minimum pad layout per the datasheet recommendation; a smaller pad reduces the effective power capability. ## Sourcing and supply For BOM qualification, the AEC-Q101 documentation and the TRANSIL™ series reliability report are available to support PPAP submissions.","metaTitle":"STMicroelectronics SM15T33AY TVS Diode, 1500W, AEC-Q101","metaDescription":"STMicroelectronics SM15T33AY automotive TVS diode, 1500W peak pulse power, 28.2V standoff, 59V clamping, AEC-Q101 qualified.","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":"SM15T33","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"31.4V","Voltage - Clamping (Max) @ Ipp":"59V","Voltage - Reverse Standoff (Typ)":"28.2V","Current - Peak Pulse (10/1000µs)":"169A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SM15T33AY/alternatives.json"},"ai":{"faq":[{"question":"Is SM15T33AY AEC-Q101 qualified?","answer":"Yes, it is listed in the Automotive, AEC-Q101 series, which means it passed the automotive-grade stress tests for discrete semiconductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T33AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T33AY 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}}