The SMD3225-400N Gas Discharge Tube (GDT) from RUILON is a high-voltage surge protection device engineered to protect sensitive electronic circuits from lightning strikes, transient overvoltage, and high-energy electrical disturbances. With a nominal DC spark-over voltage of 400V (tested at 100V/µs), it provides fast and reliable triggering, ensuring efficient diversion of surge currents and safeguarding critical components.
Built using advanced ceramic gas discharge technology, the SMD3225-400N delivers stable impulse spark-over performance (1kV/µs), high insulation resistance, and ultra-low capacitance at 1 MHz, making it ideal for high-speed communication lines and signal-sensitive applications. Its strong impulse discharge current capability (8/20µs waveform) and excellent impulse withstand voltage ensure long service life and consistent protection even under repeated surge stress conditions.
Compared to lower voltage variants, the 400V model offers significantly higher operating voltage margin and enhanced protection stability, making it suitable for industrial, telecom, and power systems requiring robust high-voltage surge protection. The SMD3225 package provides excellent thermal dissipation, mechanical strength, and supports automated surface-mount assembly, ensuring flexibility in modern compact PCB designs.
Key Features:
- DC Spark-Over Voltage: 400V @ 100V/µS
- Stable impulse spark-over voltage @ 1kV/µS
- High surge current capability (8/20µS)
- Low capacitance @ 1 MHz for signal integrity
- High insulation resistance
- Long service life and high reliability
- Compact SMD3225 surface-mount package
Applications:
- Telecom and networking infrastructure
- Industrial control and automation systems
- Power supply and energy systems
- Smart grid and smart meters
- Consumer electronics and IoT devices
- Lightning and surge protection circuits
