{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMCJ20A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMCJ20A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMCJ20A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMCJ20A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMCJ, TRANSIL™ series, TVS Zener, Unidirectional, 1 Channel, 20V Reverse Standoff, 22.2V Breakdown Min, 42.8V Clamping, DO-214AB SMC, Surface Mount, -55°C to 150°C.","salesMarkdown":"## What the SMCJ20A-TR is and what it protects It uses a Zener breakdown structure to shunt surge energy away from sensitive downstream circuitry. With a peak pulse power rating of 1500W (1.5kW) and a clamping voltage of 42.8V at the peak pulse current of 234A (tested with an 8/20µs waveform), this part handles the kind of surge you see from inductive load dumps, lightning-induced transients, or ESD events in industrial and telecom equipment. ## Voltage ratings and the protection window The reverse standoff voltage is 20V — the rail voltage the part sits across without conducting in normal operation. The breakdown voltage is guaranteed to start clamping between 22.2V (minimum) and the clamping maximum of 42.8V. That 20V to 42.8V window means the protected rail must tolerate the clamping voltage without latch-up or damage. For a 20V supply bus, this is a standard fit; for a 15V rail, the clamping voltage may be too high and a lower-voltage SMCJ variant should be selected. ## Peak pulse power and current — what the numbers mean The 1500W peak pulse power is measured with a 10/1000µs waveform, while the 234A peak pulse current is specified with an 8/20µs waveform — the faster rise time of the 8/20µs pulse delivers a higher current for the same energy. In practice, the 234A figure tells you the part can survive a direct lightning surge at the secondary-protection level, or a heavy inductive kickback. The 1500W rating is the thermal limit for a single pulse; repetitive surges need derating per the datasheet curve.","metaTitle":"STMicroelectronics SMCJ20A-TR TVS Diode, 1500W, DO-214AB","metaDescription":"SMCJ20A-TR is a 1500W unidirectional TVS diode from STMicroelectronics, 20V standoff, 42.8V clamping, 234A peak pulse. Active lifecycle, surface mount DO-214AB.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMCJ, 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":"SMCJ20","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"22.2V","Voltage - Clamping (Max) @ Ipp":"42.8V","Voltage - Reverse Standoff (Typ)":"20V","Current - Peak Pulse (10/1000µs)":"234A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/afa32e66ad58d9d3b67a92acb79ea14b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMCJ20A-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest equivalent part for SMCJ20A-TR?","answer":"The base product number SMCJ20A is shared across the SMCJ family; the -TR suffix indicates Tape & Reel packaging. A pin-compatible alternative from another manufacturer would need to match the DO-214AB footprint, 20V standoff, and 1500W rating — a cross-reference check against the specific BOM is recommended."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMCJ20A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMCJ20A-TR 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}}