2800131

Series:	--
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Voltage - DC Spark Over (Nom):	230V
Impulse Discharge Current (8/20µs):	35000A (35kA) (10/350µs)
Tolerance:	--
Number of Poles:	4
Fail Short:	No
Mounting Type:	DIN Rail
Package / Case:	Module, Terminal Block

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Overview of Gas Discharge Tube Arresters (GDT)

Gas Discharge Tube Arresters (GDTs) are devices used to protect electrical systems from voltage transients or surges generated by lightning strikes. GDTs are sometimes referred to as spark gaps or lightning traps. GDTs are capable of conducting high surge currents, withstanding high voltage, and blocking the high voltage from passing to the protected system. The GDTs are made of a non-conductive, dielectric casing filled with a gas, typically nitrogen. A spark gap is formed between two electrodes with a thin layer of gas insulating it. When electrical current is imposed, the spark gap conducts the current to ground over-voltage protection is maintained.

Working Principle of GDTs

GDTs operate by utilizing the breakdown voltage of the gas contained within them. When input voltage is below the breakdown voltage of the gas, the GDT acts as an open circuit, not allowing voltage or current to pass. When the input voltage exceeds the breakdown voltage, the gas will begin to break down and an arc forms in between the electrodes of the GDT, allowing current and voltage to flow to ground. This arc formation conducts the surge current and facilitates the dispersal of energy, providing over-voltage protection.

Application of GDTs

GDTs are commonly used in power lines, telecommunications, computers, and other electrical systems that demand reliable over-voltage protection. GDTs have also found their way into instrumentation and audio equipment, used to protect sensitive components from power surges. GDTs are popular choices for power surges because they are generally reliable, long lasting, and relatively low cost compared to other surge protection solutions.

Types of GDTs

GDTs come in a variety of shapes and sizes, ranging from tiny GDTs used in cell phones and other small devices to large GDTs used in power lines. They can also be highly customized with different gas mixtures, and the arc length within the tube can be adjusted to meet specific voltage and current requirements. Different types of GDTs can also be combined into hybrid constructions for higher levels of voltage protection.

Advantages and Disadvantages of GDTs

The advantages of GDTs include low cost, long life, and high efficiency. They are also easily integrated into existing systems since they are relatively small and come in a variety of shapes and sizes. The main disadvantage of GDTs is that they can only protect against electricity surges; they cannot provide protection from other sources of power surges, such as electrostatic discharge or strong magnetic fields.

Conclusion

Gas Discharge Tube Arresters (GDTs) are widely used for over-voltage protection in a variety of applications, ranging from cell phones to power lines. GDTs operate by utilizing the breakdown voltage of the gas contained within them to conduct current and dissipate the energy of the surge. GDTs offer advantages such as low cost, long life, and high efficiency, but their main disadvantage is that they cannot protect against other types of power surges.

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