{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SMAJ43CA-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SMAJ43CA-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/SMAJ43CA-TR","factsUrl":"https://icboms.com/api/mcp/products/SMAJ43CA-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SMAJ43CA-TR, TRANSIL™ series, Bidirectional Zener TVS Diode, 400W Peak Pulse Power, 43V Reverse Standoff, 91V Clamping, DO-214AC (SMA) Surface Mount Package.","salesMarkdown":"## What this TVS protects and how it clamps Its 47.8 V minimum breakdown voltage means conduction begins cleanly above the operating level, and the 91 V maximum clamping voltage limits the spike the downstream circuitry sees during a 25 A (8/20 µs) pulse. The single bidirectional channel handles both positive and negative going transients on one line, saving board space versus two unidirectional devices back-to-back. ## Voltage ratings — what each number means for the protected rail The 47.8 V minimum breakdown voltage is the threshold where the Zener junction starts to avalanche; below this, the part is effectively an open circuit. The 91 V maximum clamping voltage is the worst-case voltage the load sees during a surge — the designer must ensure that downstream components (MOSFETs, controllers, capacitors) are rated for at least this peak. The 8/20 µs waveform is common for lightning-induced transients in industrial and automotive environments.","metaTitle":"SMAJ43CA-TR Bidirectional TVS Diode, 400W, 43V Standoff","metaDescription":"STMicroelectronics SMAJ43CA-TR bidirectional Zener TVS diode. 400W peak pulse power, 43V standoff, 91V clamping, DO-214AC. Active lifecycle. Available to order.","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":"SMAJ43","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)":"47.8V","Voltage - Clamping (Max) @ Ipp":"91V","Voltage - Reverse Standoff (Typ)":"43V","Current - Peak Pulse (10/1000µs)":"25A (8/20µs)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cb45a0c551131e855efff64db719fd1e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SMAJ43CA-TR/alternatives.json"},"ai":{"faq":[{"question":"Is SMAJ43CA-TR a bidirectional TVS diode?","answer":"Yes, it is a single bidirectional channel device. It clamps both positive and negative transients on the same line, eliminating the need for two unidirectional diodes in anti-series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SMAJ43CA-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SMAJ43CA-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}}