The SMA6J43A from RUILON is a high-performance 400W Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic circuits from voltage transients, electrostatic discharge (ESD), and surge events. Packaged in the compact SMA (DO-214AC) form factor, it offers an excellent balance between high power handling capability and PCB space efficiency, making it ideal for modern compact and high-density electronic designs.
With a 43V reverse standoff voltage, the SMA6J43A is well-suited for medium-voltage power rails and signal line protection, ensuring reliable operation under normal conditions while rapidly clamping harmful transient spikes. Its ultra-fast response time enables immediate suppression of voltage surges, effectively protecting critical components such as ICs, microcontrollers, and communication interfaces.
The device supports a peak pulse power dissipation of 400W (10/1000 µs waveform), providing strong energy absorption capability and excellent surge endurance under repeated transient stress. Compared to lower-voltage TVS diodes, the SMA6J43A offers a higher breakdown threshold, making it more suitable for applications requiring enhanced voltage margin and robust system-level protection.
Built using advanced silicon avalanche technology, it delivers low leakage current, precise clamping performance, and long-term operational stability. This ensures dependable protection for electronic systems operating in harsh electrical environments.
Key Features
- 400W peak pulse power dissipation (10/1000 µs waveform)
- 43V reverse standoff voltage for medium-voltage protection
- Ultra-fast response time for instant surge and ESD suppression
- Low leakage current for efficient and stable operation
- High surge capability for repeated transient events
- Strong clamping performance for sensitive electronics protection
- Compact SMA (DO-214AC) surface-mount package
- Silicon avalanche structure for high reliability and durability
Applications
- Automotive electronic systems and ECU protection
- Industrial automation and control equipment
- Power supply line protection (AC/DC rails)
- Communication interfaces (RS-485, RS-232, Ethernet)
- Consumer electronics and smart devices
- LED lighting drivers and power modules
- Portable electronic and battery-powered systems
- I/O ports and signal line ESD protection
