{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ70A-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMAJ70A-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMAJ70A-TR","factsUrl":"https://icboms.com/api/mcp/products/SMAJ70A-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMAJ70A-TR, TRANSIL™ series, TVS Zener diode, 70V reverse standoff, 400W peak pulse power, 1 unidirectional channel, DO-214AC (SMA) surface mount, -55°C to 150°C junction temperature.","salesMarkdown":"The STMicroelectronics SMAJ70A-TR is a unidirectional TRANSIL™ TVS diode in the SMAJ series, built for general-purpose transient suppression. It's a Zener-type device, not a signal diode — the scorch mark on a dead board tells you the clamping junction took the hit. The key numbers for fit: 70V reverse standoff (the rail it protects), 77.8V minimum breakdown (where it starts conducting), and 146V maximum clamping at Ipp (the voltage the downstream silicon sees). If your 70V rail sees transients that stay under 146V, this part keeps the rest of the board alive. ## Package and temperature — where it lives on the board Housed in a DO-214AC (SMA) package, surface-mount only. The SMA footprint is common and easy to rework with hot air — no underfill needed. No power line protection (it's unidirectional), so keep it on signal or low-voltage DC rails.","metaTitle":"STMicroelectronics SMAJ70A-TR TVS Diode, 70V Standoff, 400W","metaDescription":"STMicroelectronics SMAJ70A-TR TRANSIL™ TVS diode: 70V reverse standoff, 400W peak pulse power, DO-214AC SMA package.","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":"SMAJ70","Operating Temperature":"-55°C~150°C(TJ)","Power Line Protection":"No","Capacitance @ Frequency":"-","Supplier Device Package":"SMA (DO-214AC)","Unidirectional Channels":"1","Voltage - Breakdown (Min)":"77.8V","Voltage - Clamping (Max) @ Ipp":"146V","Voltage - Reverse Standoff (Typ)":"70V","Current - Peak Pulse (10/1000µs)":"16A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cb45a0c551131e855efff64db719fd1e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMAJ70A-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to SMAJ70A-TR?","answer":"However, the SMAJ series is a standard JEDEC DO-214AC footprint, and many TVS manufacturers offer a 70V unidirectional part in the same package — a parametric search for 70V standoff, 400W peak pulse power, DO-214AC will yield candidates for evaluation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMAJ70A-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMAJ70A-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}}