{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM30T18CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM30T18CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM30T18CAY","factsUrl":"https://icboms.com/api/mcp/products/SM30T18CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM30T18CAY, Automotive AEC-Q101 TRANSIL™ TVS diode, bidirectional, 3000W peak pulse power, 15V reverse standoff, 24.4V clamping, DO-214AB SMC package, -55°C to 175°C.","salesMarkdown":"## 3000 W peak pulse power for 15 V rails The STMicroelectronics SM30T18CAY is a bidirectional TRANSIL™ TVS diode from the SM30TY series, rated for automotive applications and qualified to AEC-Q101. It delivers 3000 W of peak pulse power (10/1000 µs waveform) with a reverse standoff voltage of 15 V and a clamping voltage of 24.4 V at the rated peak pulse current of 123 A. This part is designed to protect 12 V and 15 V DC power rails and signal lines in automotive electronic control units, battery management systems, and sensor modules where transient overvoltage events from load dump, inductive kickback, or ESD must be clamped within the semiconductor breakdown limits of downstream components. ## AEC-Q101 qualification and temperature range This temperature grade also suits industrial applications with high thermal stress, such as motor drives and outdoor telecom power supplies. ## Bidirectional clamping in a single SMC package This is a single-channel bidirectional device, so it clamps symmetrically on both positive and negative transients — useful for AC-coupled signal lines or bipolar supplies where polarity is not fixed. The DO-214AB (SMC) package is a surface-mount footprint common for 3000 W TVS diodes, with a body size that suits automated assembly and reflow soldering. ## Active production — no LTB concern For dual-sourcing or supply resilience, the base product number SM30T18 covers unidirectional and bidirectional variants across the SM30TY series — confirm the exact ordering code suffix for your BOM line.","metaTitle":"STMicroelectronics SM30T18CAY TVS Diode, 3000W, AEC-Q101","metaDescription":"STMicroelectronics SM30T18CAY bidirectional TVS diode, 3000W peak pulse power, 15V standoff, AEC-Q101 qualified, -55°C to 175°C, SMC package.","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":"SM30T18","Operating Temperature":"-55°C~175°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","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":"$1.5000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c1da1532b421560a6148be51fb30338a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM30T18CAY automotive qualified?","answer":"Yes, SM30T18CAY is AEC-Q101 qualified, making it suitable for automotive-grade applications including under-hood and chassis-domain electronics."},{"question":"What is the peak pulse power of SM30T18CAY?","answer":"The SM30T18CAY is rated for 3000 W peak pulse power under a 10/1000 µs waveform, with a peak pulse current of 123 A at the clamping voltage of 24.4 V."},{"question":"Is SM30T18CAY bidirectional?","answer":"Yes, the SM30T18CAY is a single-channel bidirectional TVS diode, clamping symmetrically on both positive and negative transients."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM30T18CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM30T18CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T15:42:48.743Z","lastPublished":"2026-07-16T15:42:48.743Z","indexable":true}}