SMD3216-400N Gas Discharge Tubes – SMD3216 Package | RUILON

The SMD3216-400N Gas Discharge Tube (GDT) from RUILON is a high-voltage surge protection device designed to safeguard electronic systems from lightning-induced surges, transient overvoltage, and high-energy electrical disturbances. With a nominal DC spark-over voltage of 400V (tested at 100V/µs), it provides fast and reliable triggering performance, ensuring efficient diversion of surge energy away from sensitive circuit components.

Manufactured using advanced ceramic gas discharge technology, the SMD3216-400N delivers stable impulse spark-over characteristics (1kV/µs), high insulation resistance, and ultra-low capacitance at 1 MHz, making it highly suitable for high-speed communication and signal lines where signal integrity is critical. Its strong impulse discharge current capability (8/20µs waveform) and excellent impulse withstanding voltage ensure long-term durability under repeated surge events.

Compared to lower voltage GDT series, the 400V variant offers significantly higher operating voltage tolerance and improved protection margin, making it ideal for higher-voltage industrial and communication applications. The compact SMD3216 package supports efficient PCB layout, automated surface-mount assembly, and reliable integration into space-constrained electronic designs.

Key Features:

• DC Spark-Over Voltage: 400V @ 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 SMD3216 surface-mount package

Applications:

• Industrial power and control systems
• Telecom and networking equipment
• Smart grid and energy systems
• Communication modules and IoT devices
• Consumer electronics protection
• Lightning and surge protection circuits