{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMCJ22A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMCJ22A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMCJ22A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMCJ22A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMCJ22A-TR, TRANSIL™ series, unidirectional Zener TVS diode, 22V reverse standoff voltage, 24.4V min breakdown, 48.3V clamping, 1500W peak pulse power, DO-214AB SMC package, surface mount.","salesMarkdown":"Its 24.4V minimum breakdown voltage means it starts conducting just above the rail's normal tolerance, and the 48.3V maximum clamping voltage at the peak pulse current of 207A (8/20µs waveform) defines the upper bound the protected circuit sees during a surge. ## Unidirectional — one rail, one polarity This is a unidirectional device, meaning it protects a single polarity rail (e.g., a positive DC bus referenced to ground). For AC lines or bipolar supplies, you would need a bidirectional variant from the same SMCJ family. The single-channel construction is the standard choice for DC power inputs, signal lines, and low-voltage DC buses where the transient is unipolar.","metaTitle":"STMicroelectronics SMCJ22A-TR TRANSIL TVS, 22V Standoff","metaDescription":"STMicroelectronics SMCJ22A-TR unidirectional Zener TVS diode. 22V reverse standoff, 24.4V min breakdown, 48.3V clamping, 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","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":"SMCJ22","Operating Temperature":"-55°C ~ 150°C (TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMC","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"24.4V","Voltage - Clamping (Max) @ Ipp":"48.3V","Voltage - Reverse Standoff (Typ)":"22V","Current - Peak Pulse (10/1000µs)":"207A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/afa32e66ad58d9d3b67a92acb79ea14b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMCJ22A-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMCJ22A-TR unidirectional or bidirectional?","answer":"It is a unidirectional device, meaning it protects one polarity rail. For AC or bipolar protection, use a bidirectional variant in the same SMCJ family."},{"question":"Can I use SMCJ22A-TR for 12V protection?","answer":"No — the reverse standoff voltage is 22V, which is too high for a 12V rail. A 12V rail typically needs a TVS with a standoff voltage around 12V to 13V (e.g., SMCJ12A). Using a 22V standoff part would leave the rail unprotected until the transient exceeds 24.4V, by which point the downstream components may already be damaged."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMCJ22A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMCJ22A-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}}