{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SM6T200A","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SM6T200A","canonicalUrl":"https://icboms.com/stmicroelectronics/SM6T200A","factsUrl":"https://icboms.com/api/mcp/products/SM6T200A","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SM6T200A, TRANSIL™ TVS diode, Type Zener, 600W peak pulse power, 171V reverse standoff, 353V clamping, 1 unidirectional channel, DO-214AA SMB package, -55°C to 150°C junction temperature.","salesMarkdown":"## What this TRANSIL TVS does in the board The STMicroelectronics SM6T200A is a 600W unidirectional TRANSIL TVS diode in a DO-214AA SMB package. It clamps transients on a 171V nominal rail — the reverse standoff voltage — and fires at 190V minimum breakdown, holding the clamp to 353V at the 11.3A peak pulse current (8/20µs waveform). That 353V ceiling is what the downstream silicon has to survive; if your DC bus regulator or downstream cap is rated for 400V, this part buys you the margin. Rated for junction temps from -55°C to 150°C, so it handles hot engine bays or outdoor cabinets without derating drama. ## Field-swap reality: orientation and soldering The SMB package has a cathode band — the end with the stripe is the cathode, same as a standard signal diode. On a unidirectional part like this one, the cathode goes toward the protected rail, anode to ground. Get it backwards and it conducts at the standoff voltage, not the breakdown. Hand-solderable with a fine-tip iron if you have steady hands and a magnifier; the SMB body is small but the leads are wide enough to wet. No lab bench needed, just a clean tip and some flux. If you are swapping one on a live board, kill the power first — the 600W rating means it can dump a lot of energy into a short if the board is still hot.","metaTitle":"STMicro SM6T200A TVS Diode, 600W, DO-214AA SMB","metaDescription":"STMicro SM6T200A TRANSIL TVS, 600W peak pulse, 171V standoff, 353V clamp. Active production. RFQ for price and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SM6T, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"600W","Base Product Number":"SM6T200","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMB (DO-214AA)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"190V","Voltage - Clamping (Max) @ Ipp":"353V","Voltage - Reverse Standoff (Typ)":"171V","Current - Peak Pulse (10/1000µs)":"11.3A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1e6a6ede6221d6b6009e7d617f0a0cd9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SM6T200A/alternatives.json"},"ai":{"faq":[{"question":"Is SM6T200A suitable for 200V circuit protection?","answer":"Not directly. The SM6T200A has a 171V reverse standoff voltage, meaning it starts clamping above that level. The 190V minimum breakdown is below 200V, so on a 200V rail it would conduct during normal operation. For a 200V rail, look at the SM6T220A or similar with a higher standoff rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SM6T200A","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SM6T200A 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}}