Gas dicharge tube (GDT) is a switch type device by Voltage conduction. it's in parallel line and line or between line and carry of protected the equipment when using. Cermic gas discharge tube is the most widely used in lightning protection equipment switching devices, large surge current, Insulation resistance up to 1000Mega Ohms, The breakown voltage dispersion is bigger.

Feature:

1. Low Capacitance

2. Very high surge current capability

3. Isolation: impedance very high

4. Voltage can be from dozens of volts to hundreds of volts even kV

Application:

1. Lightning protection device

2. Repeaters

3. Modems

4. Teleohone interface. line card