Series:	--
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Voltage - DC Spark Over (Nom):	230V
Impulse Discharge Current (8/20µs):	50000A (50kA) (10/350µs)
Tolerance:	--
Number of Poles:	3
Fail Short:	--
Mounting Type:	DIN Rail
Package / Case:	Module

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Gas Discharge Tube Arresters (GDT)

Gas discharge tube (GDT) arresters are a type of electrical transients protection device. A GDT arrester is usually made of an insulated ceramic tube containing a gas, which is an inactive gas such as nitrogen, xenon, etc. Depending on the type of GDT used, they may be designed to protect against high voltage transients (surges) or short circuit currents.

Applications

GDT arresters are mainly used in electrical power transmission, distribution, and industrial applications. GDTs are used to protect telecommunications equipment, as well as other high-value electrical equipment such as computers, motors, and transformers.They are used to protect against power surges and lightning in applications such as power line protection, overhead line protection, and substation protection. GDTs are also used in the protection of home and building computer systems.

Working Principle

GDTs work by passing a non-conductive gas between the electrodes. This gas is designed to limit the amount of current that can pass between the electrodes.When a surge of current greater than the GDT’s rated capacity is applied to the GDT, the gas is ionized to form a conducting path between the electrodes. This ionized path passes the current and reduces the applied voltage to a safe level. The current then passes to ground, keeping the equipment and lines safe from the high voltage surge.Once the surge has passed, the ionized conducting path is broken, and the GDT returns to its non-conductive state. This process repeats itself for each surge, making the GDT a reliable protection device.

Conclusion

Gas discharge tube arresters (GDTs) are a reliable protection device used in a variety of applications. GDTs work by passing a non-conductive gas between their electrodes, limiting the amount of current that can pass. When the current exceeds the rated capacity of the GDT, the gas is ionized and a conducting path is formed, reducing the voltage to a safe level. When the surge passes, the ionized conducting path is broken and the GDT returns to its non-conductive state.

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