3R075B-5S 75V Gas Discharge Tube (GDT) Surge Protector – 3RB-5S Package | RUILON

The 3R075B-5S is a high-performance low-voltage Gas Discharge Tube (GDT) designed for effective surge protection in sensitive electronic, telecom, and communication systems. Built in a compact 3RB-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 stable operation, long service life, and strong surge endurance under repeated electrical stress 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 against lightning surges, switching transients, and electrostatic discharge events. With ultra-low capacitance at 1 MHz, it is well-suited for high-speed data transmission and communication circuits where signal integrity must be preserved.

The 3R075B-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 repetitive surge stress, while its impulse withstand voltage rating ensures long-term operational reliability in harsh environments.

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 3RB-5S ceramic SMD package for space-saving PCB design
• High reliability in telecom and electronic protection systems

Applications

• Telecom and communication signal lines
• Low-voltage data and interface circuits
• Smart meters and IoT devices
• Consumer electronics and smart home systems
• Industrial automation and control systems
• Power supply protection circuits
• Networking and communication ports
• LED lighting and driver circuits
• High-speed data transmission systems
• Surge protection modules for sensitive electronics