SMD2921-090N Gas Discharge Tubes – SMD2921 Package | RUILON

The SMD2921-090N Gas Discharge Tube (GDT) from RUILON is a compact and high-reliability surge protection component designed to protect sensitive electronic circuits from lightning strikes, transient overvoltage, and electrostatic discharge. With a nominal DC spark-over voltage of 90V (tested at 100V/µs), it provides fast and precise response to surge events, ensuring effective diversion of high-energy transients away from critical circuitry.

Built using advanced ceramic gas discharge technology, the SMD2921-090N offers stable impulse spark-over performance (1kV/µs), high insulation resistance, and low capacitance at 1 MHz, making it ideal for high-speed data and communication lines with minimal signal distortion. It also features strong impulse discharge current capability (8/20µs waveform) and excellent impulse withstanding voltage capacity, ensuring long-term durability and consistent protection performance under repeated surge conditions.

Compared to lower voltage GDT series, the 90V variant provides improved operating voltage margin while maintaining fast response and high surge handling capability. The SMD2921 package offers a balanced solution between compact size and enhanced thermal performance, making it suitable for space-constrained PCB designs and automated surface-mount assembly.

Key Features:

• DC Spark-Over Voltage: 90V @ 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 SMD2921 surface-mount package

Applications:

• Telecom and networking equipment
• Industrial control systems
• Power supply protection circuits
• Smart meters and communication modules
• Consumer electronics and IoT devices
• Lightning and transient voltage protection systems