PMT6350MS Circuit Protection

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Gas Discharge Tube Arresters (GDT)

PMT6350MS is a gas discharge tube arrester (GDT) based surge packaging that can be used in a wide range of circuits and applications. The main purpose of GDTs is to protect electrical systems from overvoltage caused by lightning, electro-static discharge, power system switching overvoltage or other overvoltages. The PMT6350MS is a highly reliable surge packaging with multiple voltage ranges, high surge current and very low voltage drop.

Application Field

The PMT6350MS GDT is suitable for use as a surge protector in AC power line, DC power line, signal line, telephone line, instrumentation and control line, outdoor and lightning protection distribution systems. It is commonly used in telecommunications, automation, power, railways, industrial control, instrumentation and other related fields. It can also be used in high-altitude and high-pressure applications where other surge protectors cannot be used.

Working Principle

The PMT6350MS is a dry type gas discharge tube that is filled with a specific gas under pressure. When the surge voltage reaches the breakdown voltage of the gas, the gas ionizes and dissipates the surge current. The PMT6350MS also has a ceramic capacitor and a varistor between the surge terminals that helps limit the voltage surge. The ceramic capacitor absorbs the high-frequency energy and reduces the surge voltage while the varistor handles the larger current-handling capacity of the surge.

When the high-voltage surge is mitigated, a spark-gap breaker rapidly breaks the circuit to prevent further overvoltage and to limit the surge energy to a safe level. This arrester also has current limiting devices that help regulate the current passing through the arrester. These devices usually need to be replaced or retuned after each surge event to maintain the arrester\'s performance.

The PMT6350MS GDT is designed to be highly effective against most types of surges and overvoltages, including lightning strikes, ESD, power switching, ground potential rise, and other sources. It is highly resilient and can be repeatedly used without any need of maintenance. Its shielding technology ensures the reliability and safety, providing a secure protection against voltage spikes.

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