{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T33CAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T33CAY","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T33CAY","factsUrl":"https://icboms.com/api/mcp/products/SM15T33CAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T33CAY, Automotive AEC-Q101 TRANSIL™ TVS diode, bidirectional Zener, 1500W peak pulse power, 28.2V reverse standoff, 59V clamping, 169A peak pulse current, DO-214AB SMC package, -40°C to 150°C.","salesMarkdown":"The STMicroelectronics SM15T33CAY is a bidirectional Zener TVS diode from the SM15TY TRANSIL™ series, rated for 1500 W peak pulse power over the standard 10/1000 µs waveform. That 1.5 kW rating means it can absorb the energy from a load dump or a direct inductive kick without the junction failing — a common requirement on 24 V automotive buses where the nominal rail sits at 28.2 V reverse standoff. ## AEC-Q101 and 150°C junction — where it goes That puts it squarely in under-hood and engine-bay applications — think transmission control modules, ABS pumps, or battery-management systems where ambient under the hood can hit 125°C and the junction sees the spike. The SMC (DO-214AB) package is a surface-mount footprint that handles the 1500 W pulse without needing a heatsink, provided the PCB copper area is adequate for thermal spreading. ## Bidirectional, single-channel — layout note It is a single bidirectional channel, so one device clamps both polarities on a signal or power line. The 169 A peak pulse current (8/20 µs waveform) covers direct ESD strikes and fast transients; the 10/1000 µs waveform rating is the one to use for surge coordination.","metaTitle":"SM15T33CAY TVS Diode, 1500W, 28.2V Standoff, AEC-Q101, SMC","metaDescription":"STMicroelectronics SM15T33CAY bidirectional Zener TVS diode, 1500W peak pulse, 28.2V reverse standoff, AEC-Q101 qualified, -40°C to 150°C.","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":"SM15T33","Operating Temperature":"-40°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Voltage - Breakdown (Min)":"31.4V","Voltage - Clamping (Max) @ Ipp":"59V","Voltage - Reverse Standoff (Typ)":"28.2V","Current - Peak Pulse (10/1000µs)":"169A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3caa9efa0f4fede168088411f4832fd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SM15T33CAY/alternatives.json"},"ai":{"faq":[{"question":"Is SM15T33CAY AEC-Q101 qualified?","answer":"Yes, the SM15T33CAY is part of the Automotive, AEC-Q101 series, making it qualified for automotive-grade applications."},{"question":"What is the replacement for SM15T33CAY?","answer":"No official replacement or successor is listed. The part is active, so a replacement is not needed for current designs."},{"question":"Can SM15T33CAY replace SM15T33CA?","answer":"The SM15T33CAY is the automotive-qualified (AEC-Q101) variant of the base SM15T33CA. It is a pin-to-pin functional equivalent with the same electrical ratings, adding the automotive qualification. If the design requires AEC-Q101, the SM15T33CAY is the correct drop-in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T33CAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T33CAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}