Gas Discharger (GDT - Gas Discharge Tube)

Security element

Benefits

disadvantages

Use cases

Discharger

High permissible current. Low capacity. High insulation resistance.

High discharge voltage. Short service life. Low reliability. Considerable response time. Shunting of the protected circuit after the passage of a pulse. High price.

Primary protection of telecommunications and power circuits. The first stage of the combined protection.

Varistor

High permissible current. Low price. A wide range of operating currents and voltages.

Limited lifetime. High voltage limiting. Large own capacity. SMD installation problem.

Secondary protection. Protection of power circuits and automotive electronics. Protection of electronic components of the circuit board. The first and second stage of the combined protection.

TVS thyristor

Not subject to degradation. High speed.High control current.

Limited operating voltage range. Shunting of the protected circuit. The need to reduce the value of the direct current to return the device to a non-conducting state. High price.

Primary and secondary protection in telecommunication circuits

Low voltage limits. High durability and reliability. Wide operating voltage range. High speed. Low own capacity. Convenient enclosures for SMD installation. Low cost.

Low rated pulse current.

It is optimal for protecting semiconductor components on a printed circuit board. Secondary protection. Protection against electrostatic discharge and transients. End stage in combined protective devices.

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