PMT3(310)25004F Circuit Protection

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Gas Discharge Tube Arresters (GDT) are an expensive protection device that helps ensure the safety of electronic systems from electrical over-voltage. The PMT3(310)25004F is one such device and it works by limiting the voltage that can be applied to or through a system. It acts as a surge protector, tripping to isolate the system in the event of an overload. Also known as a surge diverter, it is used in applications such as telecommunications, railway signalling and power electronics.

The PMT3(310)25004F has a certain set of performance parameters which make it ideal for a range of applications. It has an operating temperature range of -50°C to +70°C, an insulation voltage of 5kV, and rated discharge current of 250A (8/20μs). It also has a low leakage current of 0.2mA maximum at 1.2nV. Additional features include an encapsulated case with an IP67 rating, an epoxy resin coating and a resilient mounting.

How the PMT3(310)25004F Works

The main principle of action of the GDT is the effect of a high voltage called a Bozo spark. This is where two or more conductors, or electrodes, are insulated by air. When a voltage in excess of the insulation breakdown level of the air is applied, an ionisation of the air occurs, forming a conductive path. This can occur within both a short and a long path, allowing for higher protection levels to be achieved.

The PMT3(310)25004F can be used in a variety of applications where protection from electrical surges is required, such as motor control centres, uninterruptible power supplies, light emitting diodes, and more. In each application, the voltage triggers the spark gap and the electrical surge is diverted safely. The PMT3(310)25004F also offers a higher level of protection against lightning surges, ensuring that devices connected to the system are not damaged by lightning strikes.

In conclusion, the PMT3(310)25004F is an effective, reliable device for providing surge protection in a range of applications. Its design and construction enable it to be used in extreme conditions, yet provide reliable performance. With its low leakage current levels, it is suitable for a wide range of applications, from power electronics to railway signalling. This GDT unit provides reliable protection and is perfect for keeping advanced electronic systems safe from electrical over-voltage.

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