2049-12-BLF

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Gas Discharge Tube Arresters (GDT) are devices used to protect electrical equipment from transient voltages and currents. These devices are used in applications ranging from household voltage protection to industrial and medical power supplies. GDTs provide protection by allowing a predetermined current to flow through an arc between two electrodes in a controlled manner, preventing the spread of current to other components in the circuit. The most commonly used GDTs are the 2049-12-BLF type, which are designed for use in AC/DC power supplies.

A 2049-12-BLF arrester consists of a metal tube filled with a gas mixture. The tube itself acts as a high voltage insulator, while the gas mixture helps to reduce the ionization of the air gap between the electrodes. Two electrodes are positioned inside the tube, with one being ground and the other being the high voltage electrode. When a voltage pulse reaches the electrodes, the gas inside the tube can conduct the current, allowing it to pass through without creating a spark or causing any damage to the surrounding components. The current is then dissipated to the ground, preventing it from flowing to other components in the circuit.

The working principle of the 2049-12-BLF is based on capacitive voltage division. This means that when a high voltage is applied to the electrodes, it is divided among the three components of the system. The first two components are the capacitive elements of the arrester, which divide the voltage across the electrodes. The third component is the gas mixture in the tube, which acts as a resistive element and dissipates any unbalanced charge between the electrodes back to the ground.

As the voltage on the electrodes increases, the gas mixture will begin to ionize and the current will be conducted through the tube, allowing it to flow to the ground. The voltage on the electrodes decreases as the charge on them is dissipated, and the arc is extinguished. The amount of voltage applied to the electrodes determines the breakdown voltage and the length of the discharge. The 2049-12-BLF arrester is designed to have a low breakdown voltage, so that the current can be controlled and the arc extinguished quickly.

The 2049-12-BLF arrester is used in many applications to protect electrical components from transient voltages and currents. It is primarily used in AC/DC power supplies, but can also be used in any type of electrical circuit where a surge or spark needs to be protected. The 2049-12-BLF arrester is a reliable and cost-effective way to protect sensitive electrical equipment from transient voltages and currents.

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