{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM30T18AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM30T18AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM30T18AY","factsUrl":"https://icboms.com/api/mcp/products/SM30T18AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM30T18AY, TRANSIL™ series, Automotive Zener TVS diode, 3000W peak pulse power, 15V reverse standoff, 24.4V clamping, 123A peak pulse current, DO-214AB SMC package, AEC-Q101 qualified, -55°C to 175°C.","salesMarkdown":"## 3000W automotive transient suppressor for 15V rails The STMicroelectronics SM30T18AY is a unidirectional Zener TVS diode from the TRANSIL™ SM30TY series, designed to clamp transients on automotive 15V supply lines. It delivers 3000W peak pulse power (10/1000µs waveform) with a clamping voltage of 24.4V at 123A peak pulse current. The 16.7V minimum breakdown voltage ensures the protection window stays tight against the 15V reverse standoff rating. ## AEC-Q101 and the 175°C junction limit AEC-Q101 qualification and the -55°C to 175°C operating junction temperature range qualify this part for under-hood and engine-bay environments where ambient heat and repetitive surge stress are the norm. The 175°C ceiling is the absolute junction limit — derate the 3000W peak pulse power above 25°C per the datasheet's thermal derating curve. ## DO-214AB SMC — footprint and board-level fit Housed in the DO-214AB (SMC) surface-mount package, the SM30T18AY uses the standard SMC footprint shared by many 3000W-class TVS diodes. No power line protection is built in — this is a unidirectional rail clamp, not a steering-diode array. The single-channel design protects one unidirectional line per device.","metaTitle":"SM30T18AY STMicroelectronics Zener TVS, 3000W AEC-Q101","metaDescription":"SM30T18AY automotive Zener TVS diode, 3000W peak pulse power, 15V standoff, AEC-Q101 qualified.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Grade":"Automotive","Series":"SM30TY, TRANSIL™","Package":"Tape & Reel (TR) Cut Tape (CT)","Applications":"-","Mounting Type":"Surface Mount","Qualification":"AEC-Q101","Package / Case":"DO-214AB, SMC","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"3000W (3kW)","Base Product Number":"SM30T18","Operating Temperature":"-55°C ~ 175°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"16.7V","Voltage - Clamping (Max) @ Ipp":"24.4V","Voltage - Reverse Standoff (Typ)":"15V","Current - Peak Pulse (10/1000µs)":"123A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c1da1532b421560a6148be51fb30338a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM30T18AY AEC-Q101 qualified for automotive use?","answer":"Yes, the SM30T18AY carries AEC-Q101 qualification, making it suitable for automotive-grade applications including under-hood and powertrain modules that require documented reliability screening."},{"question":"Does SM30T18AY have a replacement or equivalent part?","answer":"The SM30T18AY is an active product, so no successor has been designated. For a pin-compatible alternative within the same TRANSIL™ family, the base product number SM30T18 covers the same die in different package or qualification variants — verify the specific suffix for your application."},{"question":"Is SM30T18AY RoHS compliant?","answer":"The available records do not explicitly state RoHS compliance status. Verify with the manufacturer's latest documentation or your distributor's compliance data before ordering."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM30T18AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM30T18AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:50:07.027Z","lastPublished":"2026-07-16T14:50:07.027Z","indexable":true}}