{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM15T18CA","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM15T18CA","canonicalUrl":"https://icboms.com/stmicroelectronics/SM15T18CA","factsUrl":"https://icboms.com/api/mcp/products/SM15T18CA","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM15T18CA, TRANSIL™ series, Bidirectional Zener TVS Diode, 1500W peak pulse power, 15.3V reverse standoff, 32.5V clamping, DO-214AB SMC package, Surface Mount, -55°C to 150°C.","salesMarkdown":"The STMicroelectronics SM15T18CA is a bidirectional Zener TVS diode from the TRANSIL™ family, designed to clamp transients on a 15.3 V nominal rail. Its 1500 W peak pulse power rating (10/1000 µs waveform) means it can handle substantial surge energy — think industrial 24 Vdc supplies, automotive load-dump residuals, or telecom line protection where the energy budget is higher than a 600 W device can cover. The 32.5 V clamping voltage at 308 A peak pulse current gives you the headroom to keep downstream silicon safe without needing a second-stage clamp for most common-mode events. ## Bidirectional — one device, both polarities A single bidirectional channel means this part protects against positive and negative transients equally. That simplifies the BOM for AC-coupled signal lines, dual-polarity supplies, or any application where the fault polarity isn't guaranteed. No need to back-to-back two unidirectional devices — one SM15T18CA does the job in a single DO-214AB SMC footprint. ## Package and temperature range Housed in the DO-214AB (SMC) package, the SM15T18CA is a surface-mount device suited for reflow assembly. No power line protection is built in — this is a pure transient suppressor for signal and low-power supply rails, not a mains-side protector.","metaTitle":"STMicroelectronics SM15T18CA TVS Diode, 1500W, Bidirectional","metaDescription":"STMicroelectronics SM15T18CA TRANSIL bidirectional TVS diode. 1500W peak pulse power, 15.3V standoff, 32.5V clamping. DO-214AB SMC. Active, 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":"SM15T, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","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":"-55°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","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":"$0.9700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/539ce92ad6505c8a9d704773ec1ef151.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the peak pulse power of SM15T18CA?","answer":"The SM15T18CA is rated for 1500 W peak pulse power (10/1000 µs waveform)."},{"question":"What is the difference between SM15T18CA and SM15T18A?","answer":"The SM15T18CA is the bidirectional version; the SM15T18A is unidirectional. Both share the same voltage ratings and 1500 W power rating, but the CA variant protects both polarities with a single device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM15T18CA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM15T18CA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T14:37:00.735Z","lastPublished":"2026-07-16T14:37:00.735Z","indexable":true}}