3R075A-5S 75V Gas Discharge Tube (GDT) Surge Protector – 3RA-5S Package | RUILON

The 3R075A-5S is a low-voltage Gas Discharge Tube (GDT) designed for highly efficient surge protection in sensitive electronic and communication systems. Built in a compact 3RA-5S ceramic SMD package, this device provides reliable over-voltage protection by safely diverting high-energy transient surges away from delicate circuit components. Manufactured by RUILON, it ensures excellent stability, long service life, and consistent performance under repeated surge conditions.

This GDT features a 75V DC spark-over voltage (measured at 100V/µs), making it ideal for protecting low-voltage signal lines and sensitive electronic interfaces. It also supports impulse spark-over capability at 1kV/µs, ensuring fast response to lightning surges, electrostatic discharge events, and switching transients. With ultra-low capacitance at 1 MHz, it is particularly suitable for high-speed data lines and communication circuits where signal integrity must be preserved.

The 3R075A-5S offers high insulation resistance and optimized discharge behavior, 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 repetitive surge stress, while its impulse withstand voltage rating ensures long-term operational reliability.

Key Features

• 75V 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 low-voltage protection
• High impulse discharge current capability (8/20µs waveform)
• Stable glow and controlled arc voltage for efficient surge handling
• Long service life with strong repetitive surge endurance
• Compact 3RA-5S ceramic SMD package for space-saving PCB design
• High reliability in low-voltage signal protection applications

Applications

• Telecom and communication signal lines
• Low-voltage data and interface protection
• Smart meters and IoT devices
• Consumer electronics and smart home systems
• Industrial control and automation circuits
• Power supply input/output protection
• Networking and communication ports
• LED drivers and lighting control systems
• Signal integrity protection circuits
• Surge protection modules for sensitive electronics