2026-20-CLF

Series:	TRIGARD® 2026
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Voltage - DC Spark Over (Nom):	200V
Impulse Discharge Current (8/20µs):	20000A (20kA)
Tolerance:	±20%
Number of Poles:	3
Fail Short:	No
Mounting Type:	Through Hole
Package / Case:	Axial Cylinder, 3 Lead (T-Shape)

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Gas Discharge Tube Arresters (GDT)

Gas Discharge Tube (GDT) arrester is becoming increasingly important in electrical power systems due to the explosive growth of computer and digital technologies. It is used to protect electrical power grids, substations and equipment from lightning strikes and power surges. The arrester works by diverting and dissipating energy that enters it during a transient. The GDT arrester is basically composed of a gas filled glass tube containing two electrodes. The gas is usually an inert gas, such as air, nitrogen, or argon, and the electrodes are usually made of metal.

Working Principle

When lightning strike or power overloaded, excessive voltage or current will occur. The voltage or current is much higher than the normal operating voltage or current. If this excessive voltage or current is not controlled and dissipated in time, it will cause serious damage to the electrical power system or equipment. The GDT arrester can effectively protect the power system from over-voltage or over-current by releasing a spark gap between the two electrodes in the tube.When the voltage rise above the limited value, a spark gap occurs in the discharge tube. When a spark gap occurs, electrons flow from one electrode to the other, forming an electric arc between the two electrodes. This electric arc will absorb the energy of the excessive voltage or current and dissipate it in the form of heat. This process of energy dissipation continues until the voltage or current falls below the limited value.

Applications

A GDT arrester is designed to protect sensitive electronic components from transient surge voltages. Some common applications of GDT arresters include television antennas, lightening protection, electronic circuits and surge protection of power and communication systems.In the telecommunications industry, GDT arresters are used for protection from high frequency interference and lightning. They are used on telephone lines, radio antennas, and telecommunication equipment to provide surge protection.In the electrical power systems, GDT arresters are used to protect power grids, substations and other equipment from lightning strikes and power surges. They are usually installed at the ends of distribution lines and grounding systems.GDT arresters can also be used in industrial control systems, monitoring systems, electronic measurements and other applications subjected to high pulse transient voltages. The use of GDT arresters can make the equipment last longer and perform better.GDT arresters can also be used in residential applications. Homeowners can install GDT arresters to protect their TVs, computers, and other electronic equipment from lightning strikes or power surges.

Conclusion

Gas Discharge Tube (GDT) arresters are an important part of power and communication systems. They provide protection from lightning strikes and power surges and can be used in both residential and industrial applications. The GDT arrester works by releasing a spark gap between the two electrodes in the tube, which absorbs and dissipates the energy of over-voltage or over-current. The use of GDT arresters can help protect electronic equipment and make them last longer.

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