{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ48A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMBJ48A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMBJ48A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMBJ48A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMBJ, TRANSIL™ series, TVS Zener diode, unidirectional, 48V reverse standoff, 53.3V breakdown, 77.4V clamp, 600W peak pulse, DO-214AA SMB, -55°C to 150°C.","salesMarkdown":"The 77.4 V clamping voltage at 8.1 A peak pulse current sets the upper bound the protected circuitry must survive. ## Breakdown and standoff — sizing the protection window The 48 V reverse standoff voltage is the maximum continuous DC voltage the diode can block without conducting — your rail must stay below this during normal operation. The 53.3 V minimum breakdown voltage is where the diode starts to avalanche; below that the protected bus is safe. With a 77.4 V clamp at 8.1 A, the device limits the spike to a level a downstream 80 V-rated MOSFET or DC-DC converter can withstand. The single unidirectional channel means polarity matters — cathode to the protected rail, anode to ground. ## Temperature range and package — board-fit considerations No power line protection (no internal series element), so it is a straight shunt to ground.","metaTitle":"STMicroelectronics SMBJ48A-TR TVS Diode, 600W, 48V Standoff","metaDescription":"STMicroelectronics SMBJ48A-TR TRANSIL TVS diode: 600W peak pulse, 48V standoff, 77.4V clamp, unidirectional, DO-214AA, -55°C to 150°C.","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":"SMBJ48","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)":"53.3V","Voltage - Clamping (Max) @ Ipp":"77.4V","Voltage - Reverse Standoff (Typ)":"48V","Current - Peak Pulse (10/1000µs)":"8.1A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/28916e022258112f057e7568b7920d5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMBJ48A-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement or equivalent for SMBJ48A-TR?","answer":"The SMBJ48A-TR is an active standard part, so no direct replacement is needed. For a second-source option, look at other manufacturers' SMBJ48A parts in the same DO-214AA package — the SMBJ series is widely cross-sourced. Verify breakdown and clamping specs match your design margin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMBJ48A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMBJ48A-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}}