{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM30T35AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM30T35AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM30T35AY","factsUrl":"https://icboms.com/api/mcp/products/SM30T35AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM30T35AY, Automotive Grade Zener Diode, 30 V Reverse Standoff, 33.3 V Breakdown, 48.4 V Clamp, 3 kW Peak Pulse Power, 62 A Peak Pulse Current, Unidirectional, DO-214AB SMC, Surface Mount, -55°C to 175°C.","salesMarkdown":"## 30 V rail protection with a 3 kW punch The STMicroelectronics SM30T35AY is a unidirectional Zener diode in the DO-214AB SMC package, designed to clamp transients on a 30 V nominal rail. With a peak pulse power rating of 3000 W (3 kW) per the 10/1000 µs waveform, it handles high-energy events like automotive load dump or industrial surge without needing a larger package. The 48.4 V maximum clamping voltage at 62 A peak pulse current gives the downstream circuitry a defined voltage ceiling during a fault. AEC-Q101 qualification covers automotive stress tests. Operating temperature range is -55°C to 175°C. Reverse standoff voltage is 30 V. Minimum breakdown voltage is 33.3 V. Clamp voltage is 48.4 V. The 3 kW peak pulse rating is tested with a 10/1000 µs waveform — a standard telecom surge shape. In real automotive transients (load dump at 87 V for 400 ms), the energy is lower but the duration longer; derate per the pulse derating curve in the datasheet if your event exceeds 1 ms. The 62 A peak pulse current is the current the diode shunts at the clamp voltage — confirm your source impedance and transient energy stay within the single-pulse SOA. ## Package and mounting The cathode band is marked on the body; the unidirectional channel means one diode per package, anode to ground. MSL 1 (no bake required before reflow) keeps the kitting line moving. ## Lifecycle and supply Base product number is SM30T35. The AY suffix indicates AEC-Q101 grade.","metaTitle":"SM30T35AY STMicroelectronics Zener Diode, 3 kW, AEC-Q101","metaDescription":"SM30T35AY automotive Zener diode from STMicroelectronics. 30 V standoff, 48.4 V clamp, 3 kW peak pulse power. AEC-Q101 qualified. SMC surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Grade":"Automotive","Series":"*","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":"SM30T35","Operating Temperature":"-55°C ~ 175°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"33.3V","Voltage - Clamping (Max) @ Ipp":"48.4V","Voltage - Reverse Standoff (Typ)":"30V","Current - Peak Pulse (10/1000µs)":"62A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c1da1532b421560a6148be51fb30338a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM30T35AY AEC-Q101 qualified?","answer":"Yes, the SM30T35AY carries AEC-Q101 qualification, making it suitable for automotive applications including under-hood and chassis-domain electronics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM30T35AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM30T35AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:42:56.555Z","lastPublished":"2026-07-16T15:42:56.555Z","indexable":true}}