{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ30A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMBJ30A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMBJ30A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMBJ30A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMBJ, TRANSIL™ series, TVS Zener diode, unidirectional, 30 V reverse standoff, 33.3 V breakdown, 48.4 V clamping, 600 W peak pulse power, DO-214AA (SMB) surface mount, -55 to 150 °C.","salesMarkdown":"## 30 V standoff, 600 W pulse — the protection threshold that matters Its 30 V reverse standoff voltage matches the nominal voltage of a 24 V or 28 V bus, so the diode stays out of conduction during normal operation and only shunts overvoltage events. ## Clamping voltage and breakdown — the margins that protect downstream silicon When the diode fires, it clamps at a maximum of 48.4 V while conducting a peak pulse current of 13 A. The minimum breakdown voltage is 33.3 V, so the protection window is tight: the rail sees no clamping below 33.3 V, and the clamp holds at 48.4 V worst-case. For a 24 V rail feeding a regulator rated at 60 V, that leaves comfortable headroom. ## Package and mounting — DO-214AA (SMB) surface mount The SMBJ30A-TR comes in the DO-214AA (SMB) package, a standard surface-mount footprint shared across the SMBJ family. Cut Tape (CT) is also available for prototype or low-volume builds.","metaTitle":"STMicroelectronics SMBJ30A-TR TVS Diode, 30 V Standoff","metaDescription":"SMBJ30A-TR from STMicroelectronics: 30 V reverse standoff, 600 W peak pulse power, unidirectional, DO-214AA (SMB) package.","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":"SMBJ30","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)":"33.3V","Voltage - Clamping (Max) @ Ipp":"48.4V","Voltage - Reverse Standoff (Typ)":"30V","Current - Peak Pulse (10/1000µs)":"13A"}},"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/SMBJ30A-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMBJ30A-TR unidirectional or bidirectional?","answer":"It is a unidirectional device with one channel. For bidirectional protection on AC or bipolar lines, you would need two back-to-back unidirectional TVS diodes or a dedicated bidirectional part."},{"question":"What is the peak pulse power rating of SMBJ30A-TR?","answer":"The peak pulse power rating is 600 W for a 10/1000 µs waveform. This defines the surge energy the diode can absorb in a single pulse event."},{"question":"Can SMBJ30A-TR replace SMBJ30A?","answer":"Yes — the SMBJ30A-TR is the same die as the SMBJ30A, just in Tape & Reel packaging. The base product number is SMBJ30, and the -TR suffix is the packaging variant. Electrically identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMBJ30A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMBJ30A-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}}