{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM30T33CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM30T33CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM30T33CAY","factsUrl":"https://icboms.com/api/mcp/products/SM30T33CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM30T33CAY, Automotive AEC-Q101 TRANSIL™ TVS diode, 3000W peak pulse power, 28V reverse standoff, bidirectional, DO-214AB SMC package, -55°C to 175°C.","salesMarkdown":"The STMicroelectronics SM30T33CAY is a 3000 W bidirectional TVS diode from the TRANSIL™ series, qualified to AEC-Q101 for automotive applications. It clamps transients at 45.4 V maximum while carrying a 66.1 A peak pulse current (10/1000 µs waveform). The 28 V reverse standoff voltage suits 24 V automotive rails or 28 V DC buses that need protection against load-dump and inductive kickback. The single bidirectional channel handles both polarities, so a single device protects a signal line or power rail without needing two unidirectional parts in anti-series. ## Automotive grade and temperature range AEC-Q101 qualification means this part has passed the automotive stress tests: high-temperature reverse bias, temperature cycling, and humidity. ## Sourcing and lifecycle posture The base product number SM30T33 covers the family; the CAY suffix denotes the bidirectional, AEC-Q101 qualified variant in the SMC package.","metaTitle":"SM30T33CAY Automotive TVS Diode, 3000W, Bidirectional, SMC","metaDescription":"STMicroelectronics SM30T33CAY automotive AEC-Q101 TVS diode, 3000W peak pulse power, 28V standoff, bidirectional, DO-214AB SMC package, -55°C to 175°C.","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, SM30TY, 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":"3000W (3kW)","Base Product Number":"SM30T33","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"31.1V","Voltage - Clamping (Max) @ Ipp":"45.4V","Voltage - Reverse Standoff (Typ)":"28V","Current - Peak Pulse (10/1000µs)":"66.1A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c1da1532b421560a6148be51fb30338a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM30T33CAY automotive qualified?","answer":"Yes, the SM30T33CAY is AEC-Q101 qualified, part of the Automotive, AEC-Q101, SM30TY, TRANSIL™ series from STMicroelectronics."},{"question":"Is SM30T33CAY bidirectional?","answer":"Yes, the SM30T33CAY has a single bidirectional channel, clamping both positive and negative transients."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM30T33CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM30T33CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:42:46.955Z","lastPublished":"2026-07-16T15:42:46.955Z","indexable":true}}