Gas discharge tube

Abstract

The present invention provides a gas discharge tube. The gas discharge tube comprises at least two electrodes and an insulation tube body being in sealing connection with the gas discharge tube to form a discharge inner chamber; the gas discharge tube is provided with low-temperature sealing binding configured to seal the discharge inner chamber; and the low-temperature binding generates fusion at a special low temperature, and the discharge inner chamber generates air leakage. When the gas discharge tube is subjected to lightning stroke or surge overvoltage, the gas discharge tube is able to discharge lightning current or overvoltage, and the gas discharge tube is able to leak to cause open circuit so as to rapidly cut off the subsequent current when the gas discharge tube is subjected to a certain continuous power current or oversize power current and cause heating and temperature rising to fuse the low-temperature sealing binding.

Description

technical field [0001] The invention relates to the field of overvoltage protection products, in particular to a gas discharge tube. Background technique [0002] The gas discharge tube is a switch type protection device, usually used as an overvoltage protection device. The gas discharge tube commonly used at present is made of an insulating tube body and electrodes sealed at both ends, and the inner cavity is filled with inert gas. When the voltage across the electrodes of the gas discharge tube exceeds the breakdown voltage of the gas, a gap discharge will be caused, and the gas discharge tube will quickly change from a high-resistance state to a low-resistance state, forming a conduction, thereby protecting other devices connected in parallel with it. . But at the same time, if the overvoltage lasts for a long time or occurs frequently, or if there is a long-term or high-current power-frequency overcurrent, the gas discharge tube will heat up due to the long-term or fr...

AI Technical Summary

Problems solved by technology

But at the same time, if the overvoltage lasts for a long time or occurs frequently, or if there is a long-term or high-current power-frequency overcurrent, the gas discharge tube will heat up due to the long-term or frequent overcurrent, which is too high. The temperature will not only affect the safe use of other devices in the circuit, but also make the gas discharge tube have a risk of short circuit or burst, and even burn the customer's circuit board to cause a fire

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