The 3R420A-5S is a high-reliability Gas Discharge Tube (GDT) designed for advanced surge protection in industrial, telecom, and electronic systems. Housed in a compact 3RA-5S ceramic SMD package, this device delivers effective over-voltage protection by safely diverting high-energy transient surges away from sensitive circuit components. Manufactured by RUILON, it ensures stable performance, long service life, and strong surge endurance under repeated electrical stress conditions.
This GDT features a 420V DC spark-over voltage (measured at 100V/µs), providing precise and consistent breakdown behavior for medium-to-high voltage protection applications. It also supports impulse spark-over capability at 1kV/µs, ensuring fast response against lightning surges, switching transients, and electrostatic discharge events. With ultra-low capacitance at 1 MHz, it is suitable for high-speed communication lines, data transmission systems, and signal-sensitive circuits where maintaining signal integrity is critical.
The 3R420A-5S offers high insulation resistance and optimized discharge characteristics, including stable glow voltage at 10mA and controlled arc voltage at 1A, ensuring efficient energy dissipation during surge events. Its high impulse discharge current capability (8/20µs waveform) enhances durability under repeated surge stress, while its impulse withstand voltage rating ensures long-term reliability in harsh operating environments.
Key Features
- 420V DC spark-over voltage (100V/µs test condition)
- High impulse spark-over capability (1kV/µs) for fast surge response
- Ultra-low capacitance @ 1 MHz for excellent signal integrity
- High insulation resistance for stable medium-to-high voltage protection
- High impulse discharge current capability (8/20µs waveform)
- Stable glow and controlled arc voltage for efficient protection
- Long service life with strong repetitive surge endurance
- Compact 3RA-5S ceramic SMD package for space-saving PCB design
- High reliability in telecom, industrial, and electronic systems
Applications
- Telecom and communication signal protection
- Industrial automation and control systems
- Smart meters and energy monitoring devices
- Power supply protection circuits
- Consumer electronics and smart home systems
- Networking and communication ports
- LED lighting and driver circuits
- High-speed data transmission systems
- IoT and embedded electronic systems
- Surge protection modules for sensitive electronics
