{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T18AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T18AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T18AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T18AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T18AY, Automotive AEC-Q101 TRANSIL™ TVS, 1500W peak pulse power, 15.3V standoff, 32.5V clamping, 1 channel unidirectional, DO-214AB SMC package.","salesMarkdown":"## Automotive-grade 1.5 kW TVS for 12 V bus protection The STMicroelectronics SM15T18AY is a 1500W unidirectional TVS diode from the AEC-Q101-qualified SM15TY TRANSIL™ series, designed for surge protection on automotive power and signal lines. With a 15.3 V reverse standoff voltage and a 32.5 V clamping point, it sits directly on 12 V battery rails, load-dump clamps, and ISO 7637-2 pulse suppressors. ## Clamping window and surge rating The 17.1 V minimum breakdown voltage gives a clean trigger point above the 15.3 V standoff, while the 32.5 V clamp keeps the protected rail inside the typical 36 V absolute-max of downstream ECUs and sensors. Peak pulse current is rated at 308 A for an 8/20 µs waveform — enough to handle the ISO 7637-2 pulse 5a load-dump energy in a 12 V system. Power line protection is not specified, so this part is intended for signal or secondary-side clamping rather than direct alternator-line suppression.","metaTitle":"STMicroelectronics SM15T18AY TVS Diode, 1.5 kW, AEC-Q101","metaDescription":"STMicroelectronics SM15T18AY automotive TVS diode, 1500W peak pulse power, 15.3V standoff, 32.5V clamping, AEC-Q101 qualified. Available to order.","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":"SM15T18","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"17.1V","Voltage - Clamping (Max) @ Ipp":"32.5V","Voltage - Reverse Standoff (Typ)":"15.3V","Current - Peak Pulse (10/1000µs)":"308A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the SM15T18AY AEC-Q101 qualified?","answer":"Yes, the SM15T18AY is part of the Automotive, AEC-Q101, SM15TY, TRANSIL™ series, which means it is qualified to the AEC-Q101 stress test standard for discrete semiconductors used in automotive applications."},{"question":"Is the SM15T18AY RoHS compliant?","answer":"The SM15T18AY is listed with a Tape & Reel (TR) package option and is part of ST's standard product line; STMicroelectronics typically qualifies these devices as RoHS-compliant, though the specific compliance status should be verified against the latest datasheet or certificate of compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T18AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T18AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:58:46.918Z","lastPublished":"2026-07-16T14:58:46.918Z","indexable":true}}