{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ12A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMBJ12A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMBJ12A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMBJ12A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMBJ12A-TR, TRANSIL™ series, TVS Zener diode, 12V reverse standoff, 600W peak pulse power (10/1000µs), unidirectional, DO-214AA (SMB) surface-mount package, -55°C to 150°C junction temperature.","salesMarkdown":"## 12 V rail protection — what the standoff and clamp ratings mean Its 12 V reverse standoff voltage means it will not conduct during normal 12 V operation, only when the line spikes above the 13.3 V minimum breakdown voltage. The 19.9 V maximum clamping voltage at the 31 A peak pulse current defines the worst-case voltage the protected circuitry sees during a surge event. The 31 A peak pulse current rating gives the design margin for a 12 V system where the source impedance is low. For higher-energy threats like direct lightning strikes, a larger TVS or additional series impedance would be needed. No power line protection feature — this is a pure transient suppressor, not a crowbar or overvoltage protector. No last-time-buy pressure for new designs.","metaTitle":"STMicroelectronics SMBJ12A-TR TVS Diode, 12V Standoff, 600W","metaDescription":"SMBJ12A-TR from STMicroelectronics: 12V reverse standoff, 600W peak pulse power, unidirectional, DO-214AA SMB package. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMBJ, 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":"SMBJ12","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)":"13.3V","Voltage - Clamping (Max) @ Ipp":"19.9V","Voltage - Reverse Standoff (Typ)":"12V","Current - Peak Pulse (10/1000µs)":"31A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/28916e022258112f057e7568b7920d5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMBJ12A-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMBJ12A-TR unidirectional or bidirectional?","answer":"It is a unidirectional device (one channel,). It clamps only one polarity, making it suitable for DC power rails. For AC signal lines or bipolar supplies, a bidirectional SMBJ series part would be needed."},{"question":"What is the peak pulse power of SMBJ12A-TR?","answer":"600 W peak pulse power per the 10/1000 µs waveform. This is the maximum surge energy the device can absorb in a single pulse before damage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMBJ12A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMBJ12A-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}}