{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T24AY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T24AY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T24AY","factsUrl":"https://icboms.com/api/mcp/products/SM15T24AY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T24AY, Automotive Zener TVS Diode, 1500W Peak Pulse Power, 20.5V Reverse Standoff, 42.8V Clamping, DO-214AB (SMC) Package, AEC-Q101 Qualified.","salesMarkdown":"## Automotive-grade 1500 W transient suppressor for 24 V bus protection The STMicroelectronics SM15T24AY is a unidirectional Zener TVS diode in the DO-214AB (SMC) package, rated for 1500 W peak pulse power (10/1000 µs waveform) and qualified to AEC-Q101. It is designed to clamp transients on 24 V automotive power buses and similar DC rails, with a 20.5 V reverse standoff voltage and a maximum clamping voltage of 42.8 V at the peak pulse current of 234 A (8/20 µs waveform). The 42.8 V maximum clamping voltage is the voltage the protected circuitry must survive during a transient event. At 234 A peak pulse current (8/20 µs), this part handles the high-energy surges typical of load-dump and jump-start conditions on a 24 V nominal system. The 20.5 V standoff voltage means the diode will not conduct appreciably below that level, so it sits quietly across the rail during normal operation. ## AEC-Q101 qualification — what the grade means for procurement AEC-Q101 is the stress-test qualification standard for discrete semiconductors used in automotive electronics. It covers temperature cycling, high-temperature reverse bias, and surge robustness beyond commercial-grade parts. For a procurement buyer, the AEC-Q101 stamp means this part meets the PPAP documentation requirements an OEM auditor expects for under-hood or chassis-domain applications. ## Package and footprint notes The DO-214AB (SMC) package is a surface-mount footprint common for 1500 W TVS diodes. It is larger than the DO-214AA (SMA) or DO-214AC (SMB) packages, sized to handle the thermal dissipation of the 1500 W surge rating.","metaTitle":"STMicroelectronics SM15T24AY Automotive TVS, 1500W, DO-214AB","metaDescription":"AEC-Q101 qualified Zener TVS diode. 20.5V standoff, 42.8V clamping at 234A (8/20µs). 1500W peak pulse power. DO-214AB (SMC).","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":"1500W (1.5kW)","Base Product Number":"SM15T24","Operating Temperature":"-40°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"22.8V","Voltage - Clamping (Max) @ Ipp":"42.8V","Voltage - Reverse Standoff (Typ)":"20.5V","Current - Peak Pulse (10/1000µs)":"234A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SM15T24AY a direct replacement for SM15T24A?","answer":"The SM15T24AY is the automotive-qualified (AEC-Q101) variant of the SM15T24A base part. The electrical specs — 20.5 V standoff, 42.8 V clamping, 1500 W peak pulse power — are identical. The 'Y' suffix denotes the automotive grade. It is a drop-in replacement for the non-automotive SM15T24A in any application that requires AEC-Q101 qualification."},{"question":"What is the peak pulse power of SM15T24AY?","answer":"The SM15T24AY is rated for 1500 W peak pulse power, measured with a 10/1000 µs waveform."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T24AY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T24AY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:26:03.923Z","lastPublished":"2026-07-16T14:26:03.923Z","indexable":true}}