{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMBJ85A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMBJ85A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMBJ85A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMBJ85A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMBJ85A-TR, TRANSIL™ TVS diode, unidirectional, 600W peak pulse power, 85V reverse standoff, 137V clamping, 4.6A peak pulse current, DO-214AA SMB package, -55°C to 150°C.","salesMarkdown":"## 85V standoff — what it protects The SMBJ85A-TR is a unidirectional TRANSIL™ TVS diode from STMicroelectronics, designed to clamp transients on 85V nominal DC rails. Its 94V minimum breakdown voltage and 137V maximum clamping ensure the protected circuit sees no more than 137V during a 10/1000µs surge event. ## 600W pulse — sizing the protection Rated for 600W peak pulse power (10/1000µs waveform), this part handles 4.6A peak pulse current at the clamping voltage. That power rating is standard for the DO-214AA SMB package — enough for secondary protection on 24V industrial buses or 48V telecom rails where the primary suppressor takes the main hit. STMicroelectronics lists the SMBJ85A-TR as obsolete. No official successor part is published. For new designs, look at the current SMBJ series (same base product number SMBJ) with the same DO-214AA footprint — the voltage rating must match the rail. ## DO-214AA footprint — board fit Surface-mount in a DO-214AA (SMB) package, the same footprint used across the SMBJ family.","metaTitle":"STMicroelectronics SMBJ85A-TR TVS Diode, 600W, 85V Standoff","metaDescription":"SMBJ85A-TR is a 600W unidirectional TVS diode from STMicroelectronics, 85V reverse standoff, 137V clamping, 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)":"94V","Voltage - Clamping (Max) @ Ipp":"137V","Voltage - Reverse Standoff (Typ)":"85V","Current - Peak Pulse (10/1000µs)":"4.6A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2454","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/28916e022258112f057e7568b7920d5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMBJ85A-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMBJ85A-TR obsolete?","answer":"Yes, STMicroelectronics has marked the SMBJ85A-TR as obsolete. No direct replacement part number has been announced. For existing designs, source through independent distribution; for new designs, select a current SMBJ series device with the same voltage rating and DO-214AA package."},{"question":"What is the peak pulse power rating of SMBJ85A-TR?","answer":"600W peak pulse power per the 10/1000µs waveform, with a peak pulse current of 4.6A at the 137V clamping voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMBJ85A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMBJ85A-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T16:28:52.380Z","lastPublished":"2026-07-16T16:28:52.380Z","indexable":true}}