{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ18A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMBJ18A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMBJ18A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMBJ18A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMBJ18A-TR, TRANSIL™ series, 600W peak pulse power TVS diode, unidirectional, 18V reverse standoff, 20V breakdown, 29.2V clamping, DO-214AA (SMB) surface mount, -55°C to 150°C.","salesMarkdown":"## Transient protection for 18V rails The STMicroelectronics SMBJ18A-TR is a 600W unidirectional TVS diode from the TRANSIL™ series, designed to clamp transients on 18V nominal supply rails. It is a Zener-type device. ## What the 600W rating means for your board For a given transient energy, a lower clamping voltage means the TVS absorbs more current; here the 21.5A peak pulse current at the 29.2V clamp gives a realistic picture of the surge it can handle. On an 18V rail, this part will catch most common-mode and differential spikes from inductive loads or hot-plug events without letting the rail rise above 29.2V. If your circuit has a tighter voltage tolerance, you would step to a lower-voltage variant in the SMBJ family; if you need more surge capacity, the SMCJ series offers 1500W in a larger package. Housed in a surface-mount package, the SMBJ18A-TR fits a standard two-pad footprint shared across the SMBJ family. The unidirectional configuration means one device protects a single rail.","metaTitle":"STMicroelectronics SMBJ18A-TR TVS Diode, 600W, 18V Standoff","metaDescription":"STMicroelectronics SMBJ18A-TR 600W TVS diode, 18V reverse standoff, 29.2V clamping, 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":"SMBJ18","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)":"20V","Voltage - Clamping (Max) @ Ipp":"29.2V","Voltage - Reverse Standoff (Typ)":"18V","Current - Peak Pulse (10/1000µs)":"21.5A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/28916e022258112f057e7568b7920d5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMBJ18A-TR/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMBJ18A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMBJ18A-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}}