The 3R420SD-8S Gas Discharge Tube (GDT) from RUILON is a high-reliability ceramic surge protection device engineered to safeguard electronic systems from transient overvoltage events such as lightning strikes and switching surges. Featuring a 420V DC spark-over voltage, this component is designed for medium- to high-voltage applications requiring stable, fast, and efficient surge suppression performance.
Built with advanced gas discharge technology, the 3R420SD-8S delivers stable impulse spark-over voltage at 1KV/µs, along with high insulation resistance and low capacitance at 1 MHz, ensuring minimal signal distortion in communication and control circuits. Its strong capability to withstand high impulse discharge current (8/20µs waveform) enables reliable energy absorption and long operational life.
Compared to lower voltage variants, the 420V model reduces false triggering in higher operating voltage environments while maintaining consistent surge protection performance. The compact 3RD-8S package supports efficient PCB layout and dependable operation in space-constrained applications.
This GDT is widely used in telecommunications equipment, power supplies, industrial automation systems, signal line protection, and surge protection devices (SPD), delivering consistent and long-lasting circuit protection.
Key Features:
- 420V DC spark-over voltage for stable surge protection
- Stable impulse spark-over performance (1KV/µs)
- High surge current capability (8/20µs waveform)
- Low capacitance for signal integrity
- High insulation resistance and reliability
- Compact 3RD-8S package for efficient PCB design
- Long service life with high surge endurance
Applications:
- Telecom and networking equipment
- Power supply and adapter protection
- Industrial automation systems
- Signal and data line protection
- Surge protection devices (SPD)
- Consumer and communication electronics
