What Is a Gas Discharge Tube?
A gas discharge tube, also known as a gas arrester or a gas-filled discharge tube, is a critical component designed to protect electronic appliances and devices from surge voltages. These surge voltages can occur instantaneously, often due to lightning strikes or other electrical disturbances.
This component is most effective when connected at the circuit entrance of electronic appliances and devices. Its primary function is to safely divert abnormal voltages to the ground, thereby preventing these potentially harmful currents from reaching and damaging the electronic equipment.
The design of a gas discharge tube may vary among different products, but it generally consists of insulating materials like ceramics. These materials house electrodes on either end with a special gas sealed inside, creating an environment conducive to stable voltage discharge. The electrodes are typically coated with materials that enhance their ability to discharge excess voltage effectively.