The 3R420B-5S Gas Discharge Tube (GDT) from RUILON is a high-reliability ceramic surge protection device engineered to protect sensitive electronic systems from transient overvoltage events such as lightning strikes and switching surges. With a 420V DC spark-over voltage, this component is ideal for medium- to high-voltage applications requiring stable and consistent surge protection performance.
Utilizing advanced gas discharge technology, the 3R420B-5S 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) provides effective surge absorption and long service life.
Compared to lower voltage GDT variants, the 420V model offers improved resistance to false triggering in higher voltage environments while maintaining reliable protection performance. The compact 3RB-5S package enables efficient PCB design and consistent 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 dependable 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 3RB-5S package for space-efficient designs
- Long service life with high surge endurance
Applications:
- Telecom and networking equipment
- Power supply and adapter protection
- Industrial automation and control systems
- Signal and data line protection
- Surge protection devices (SPD)
- Consumer and communication electronics
