{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ12CA-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMAJ12CA-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMAJ12CA-TR","factsUrl":"https://icboms.com/api/mcp/products/SMAJ12CA-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMAJ, TRANSIL™ series, Type Zener, Bidirectional TVS Diode, 400W Peak Pulse Power, 12V Reverse Standoff, 25.3V Clamp, DO-214AC SMA Package, Surface Mount, -55°C to 150°C.","salesMarkdown":"## 400W bidirectional TVS in a DO-214AC package — what it covers and what it doesn't Its 400W peak pulse power rating (10/1000µs waveform) and 25.3V clamping voltage at 91A (8/20µs) mean it handles moderate surges on low-voltage DC buses — think 12V automotive accessory lines, industrial sensor supplies, or telecom card rails. The DO-214AC (SMA) footprint is a common surface-mount package, so board layout is straightforward. Note the 13.3V minimum breakdown voltage: the diode starts conducting just above the 12V standoff, so the protected rail must tolerate that threshold without false triggering. ## Clamping voltage and peak current — the real protection numbers The 25.3V clamping voltage at 91A (8/20µs) is the number that matters when sizing downstream components: any IC on the protected rail must survive that peak voltage for the surge duration. The 400W rating is the 10/1000µs waveform, a longer pulse than the 8/20µs used for the current spec — so for fast transients (ESD, lightning-coupled spikes) the 91A figure is the relevant limit. Power line protection is marked as 'No', meaning this is a signal- or low-power-rail protector, not a mains-side suppressor.","metaTitle":"STMicroelectronics SMAJ12CA-TR TVS Diode, 400W Bidirectional","metaDescription":"STMicroelectronics SMAJ12CA-TR bidirectional TVS diode, 12V standoff, 25.3V clamp, 400W peak pulse power, DO-214AC SMA package, -55°C to 150°C.","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":"SMAJ12","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)":"13.3V","Voltage - Clamping (Max) @ Ipp":"25.3V","Voltage - Reverse Standoff (Typ)":"12V","Current - Peak Pulse (10/1000µs)":"91A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cb45a0c551131e855efff64db719fd1e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMAJ12CA-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between SMAJ12CA-TR and SMAJ12CA?","answer":"The -TR suffix on SMAJ12CA-TR indicates the tape-and-reel packaging option. The SMAJ12CA base part is electrically identical — same 12V standoff, 25.3V clamp, 400W rating — but may be supplied in bulk tube or other packaging. Both are pin-compatible and functionally interchangeable; the choice is a logistics decision based on the assembly line's feeder setup."},{"question":"What is the SMAJ12CA-TR's type and series?","answer":"The SMAJ12CA-TR is a Zener-type bidirectional TVS diode from the SMAJ / TRANSIL™ series by STMicroelectronics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMAJ12CA-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMAJ12CA-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}}