The SMA6J40A from RUILON is a high-reliability 400W Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic circuits from voltage transients, electrostatic discharge (ESD), and surge-induced damage. Built in a compact SMA (DO-214AC) surface-mount package, it provides an excellent combination of high surge capability and space-saving design, making it ideal for modern high-density PCB layouts.
With a 40V reverse standoff voltage, the SMA6J40A is optimized for medium-voltage power rails and signal line protection, ensuring stable operation under normal conditions while instantly clamping harmful voltage spikes during transient events. Its ultra-fast response time allows immediate reaction to voltage surges, effectively safeguarding critical components such as ICs, microcontrollers, and communication interfaces.
The device features a peak pulse power dissipation of 400W (10/1000 µs waveform), delivering strong energy absorption capability and reliable performance under repeated surge conditions. Compared to lower-voltage TVS devices, the SMA6J40A offers a higher breakdown threshold, making it suitable for applications requiring increased voltage tolerance and robust protection margins.
Using advanced silicon avalanche technology, it ensures low leakage current, high clamping accuracy, and long-term operational stability. This makes it a dependable solution for protecting power lines, data interfaces, and sensitive electronics in harsh electrical environments.
Key Features
- 400W peak pulse power dissipation (10/1000 µs waveform)
- 40V reverse standoff voltage for medium-voltage circuit protection
- Ultra-fast response time for instant surge and ESD suppression
- Low leakage current for improved efficiency and stability
- High surge endurance for repetitive transient events
- Strong clamping capability for sensitive device protection
- Compact SMA (DO-214AC) surface-mount package
- Silicon avalanche technology for high reliability and durability
Applications
- Automotive electronic control units (ECUs)
- Industrial automation and control systems
- Power supply input/output protection
- Communication interfaces (RS-485, RS-232, Ethernet)
- Consumer electronics and smart devices
- LED lighting and driver circuits
- Portable and battery-powered devices
- I/O port and signal line ESD protection
