{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ85CA-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMAJ85CA-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMAJ85CA-TR","factsUrl":"https://icboms.com/api/mcp/products/SMAJ85CA-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMAJ85CA-TR, SMAJ TRANSIL™ series, Bidirectional TVS Diode, 85V Standoff, 94V Breakdown, 178V Clamping, 400W Peak Pulse, DO-214AC (SMA), Surface Mount.","salesMarkdown":"## 85V rail clamp in a DO-214AC package The STMicroelectronics SMAJ85CA-TR is a bidirectional Zener-based transient voltage suppressor from the SMAJ TRANSIL™ series, designed to clamp overvoltage events on 85V nominal rails. The 94V minimum breakdown voltage and 178V maximum clamping voltage define the protection window for the downstream circuitry. ## 400W peak pulse — sizing the protection margin For an 85V rail, this translates to a peak pulse current of 13A under the 8/20µs waveform condition. When sizing the protection for a given transient threat, the clamping voltage of 178V at that current sets the maximum voltage the load sees. Derating for ambient temperature above 25°C follows the standard power-derating curve for the SMA package. The SMAJ family is a broad portfolio, so supply continuity through multiple distribution channels is the norm. The DO-214AC (SMA) footprint is a standard surface-mount package compatible with reflow soldering profiles.","metaTitle":"STMicroelectronics SMAJ85CA-TR TVS Diode, 85V Standoff, 400W","metaDescription":"STMicroelectronics SMAJ85CA-TR bidirectional TVS diode, 85V reverse standoff, 94V breakdown, 178V clamping, 400W peak pulse. Active, surface-mount DO-214AC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Protection"],"specifications":{"Mfr":"STMicroelectronics","Type":"Zener","Series":"SMAJ, TRANSIL™","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"DO-214AC, SMA","Product Status":"Active","lifecycle_stage":"eol_hot","Power - Peak Pulse":"400W","Base Product Number":"SMAJ85","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Bidirectional Channels":"1","Capacitance @ Frequency":"-","Supplier Device Package":"SMA (DO-214AC)","Voltage - Breakdown (Min)":"94V","Voltage - Clamping (Max) @ Ipp":"178V","Voltage - Reverse Standoff (Typ)":"85V","Current - Peak Pulse (10/1000µs)":"13A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cb45a0c551131e855efff64db719fd1e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMAJ85CA-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMAJ85CA-TR bidirectional?","answer":"Yes, the SMAJ85CA-TR is a bidirectional transient voltage suppressor, clamping both positive and negative transients with a single device. This eliminates the need for polarity orientation during assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMAJ85CA-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMAJ85CA-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}}