The SMD3225-120N Gas Discharge Tube (GDT) from RUILON is a high-performance surge protection component designed to protect sensitive electronic systems from lightning strikes, transient overvoltage, and high-energy electrical surges. With a nominal DC spark-over voltage of 120V (tested at 100V/µs), it delivers fast and reliable triggering, ensuring effective diversion of surge energy away from critical circuit components.
Built using advanced ceramic gas discharge technology, the SMD3225-120N offers stable impulse spark-over performance (1kV/µs), high insulation resistance, and low capacitance at 1 MHz, making it ideal for high-speed communication lines and signal-sensitive applications. Its strong impulse discharge current capability (8/20µs waveform) and excellent impulse withstand voltage ensure long service life and consistent protection under repeated surge conditions.
Compared to lower voltage variants, the 120V model provides an improved balance between sensitivity and operating voltage margin, making it suitable for systems requiring moderate voltage tolerance with strong surge protection performance. The SMD3225 package offers enhanced thermal dissipation, robust mechanical strength, and compatibility with automated surface-mount assembly, making it ideal for modern compact PCB designs.
Key Features:
- DC Spark-Over Voltage: 120V @ 100V/µS
- Stable impulse spark-over voltage @ 1kV/µS
- High surge current capability (8/20µS)
- Low capacitance @ 1 MHz for signal integrity
- High insulation resistance
- Long service life and high reliability
- Compact SMD3225 surface-mount package
Applications:
- Telecom and networking equipment
- Industrial control systems
- Power supply protection circuits
- Smart meters and IoT devices
- Consumer electronics
- Lightning and transient surge protection systems
