{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ188A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMBJ188A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMBJ188A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMBJ188A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMBJ188A-TR, TRANSIL™ series, TVS Zener diode, 188 V reverse standoff, 600 W peak pulse power, unidirectional, DO-214AA SMB surface mount, -55°C to 150°C junction temperature.","salesMarkdown":"## 188 V rail clamp — what the ratings mean The SMBJ188A-TR is a unidirectional TRANSIL™ TVS diode from STMicroelectronics designed to protect a 188 V DC rail from transient overvoltage events. Its 209 V minimum breakdown voltage ensures the device starts clamping before the protected circuitry sees damaging voltage, while the 328 V maximum clamping limits the peak voltage seen by the load during a 2 A, 10/1000 µs surge. ## Obsolete — sourcing path for this BOM line No official successor part is listed by ST, so a pin-compatible replacement within the SMBJ family (same DO-214AA footprint, same 188 V standoff) would need to be qualified against the original's clamping and pulse-power specs.","metaTitle":"SMBJ188A-TR TRANSIL™ TVS Diode, 188 V Standoff, 600 W","metaDescription":"SMBJ188A-TR is an obsolete STMicroelectronics TRANSIL™ TVS diode. 188 V reverse standoff, 600 W peak pulse power, DO-214AA SMB package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMBJ, TRANSIL™","Package":"Tape & Reel (TR)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AA, SMB","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Power - Peak Pulse":"600W","Base Product Number":"SMBJ","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)":"209V","Voltage - Clamping (Max) @ Ipp":"328V","Voltage - Reverse Standoff (Typ)":"188V","Current - Peak Pulse (10/1000µs)":"2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/28916e022258112f057e7568b7920d5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMBJ188A-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMBJ188A-TR bidirectional?","answer":"No, the SMBJ188A-TR is a unidirectional TVS diode, with one anode and one cathode for DC rail protection. For bidirectional clamping on AC lines, a different part in the SMBJ family would be needed."},{"question":"What is the peak pulse power of SMBJ188A-TR?","answer":"It is rated for 600 W peak pulse power under the 10/1000 µs waveform, which defines its single-pulse surge handling capability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMBJ188A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMBJ188A-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}