The 2R400SK-5 SMD Gas Discharge Tube (GDT) from RUILON is a high-voltage surge protection device engineered to protect sensitive electronic circuits from lightning strikes, switching transients, and other high-energy overvoltage events. Utilizing advanced ceramic gas discharge technology, this component provides rapid switching from a high-resistance state to a low-impedance conduction path, ensuring effective diversion of surge energy.
With a nominal spark-over voltage of approximately 400V, the 2R400SK-5 is ideal for applications requiring higher voltage tolerance and robust protection compared to lower-rated GDT devices. It features high insulation resistance and ultra-low capacitance, making it particularly suitable for high-frequency communication lines and signal-sensitive applications where minimal distortion is critical.
The device supports high impulse discharge current capability (8/20 µs waveform) and offers excellent durability under repeated surge conditions, ensuring long-term reliability. Its stable glow and arc voltage characteristics enhance performance consistency in harsh electrical environments.
The compact SMD package design enables seamless PCB integration and supports automated SMT assembly, making it suitable for modern, space-constrained electronics. Compared to lower voltage GDTs, the 2R400SK-5 provides superior surge handling capacity, making it a reliable choice for industrial, telecom, and power protection systems.
Key Specifications
- Part Number: 2R400SK-5
- Type: Ceramic Gas Discharge Tube (GDT)
- Package: SMD Series
- Nominal Spark-over Voltage: ~400V
- Impulse Discharge Current: 8/20 µs waveform
- Insulation Resistance: High
- Capacitance: Ultra-low (@1 MHz)
- Arc Voltage: Stable
- Glow Voltage: Controlled characteristics
- Service Life: Long lifespan under repetitive surge stress
Key Features
- High-voltage surge protection capability
- Fast response to transient overvoltage events
- Ultra-low capacitance for high-speed signal integrity
- High insulation resistance for reliable isolation
- Compact SMD footprint for space-saving PCB layouts
- Excellent surge current handling performance
- Long operational life with consistent stability
- Compatible with automated SMT processes
Applications
- Telecom and networking equipment
- Industrial automation and control systems
- Power supply and AC/DC line protection
- Consumer electronics and appliances
- Smart grid and metering systems
- Data and signal line protection
- Lightning and transient surge suppression systems
