FN256-64-52

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Power Line Filter Modules are an important component of any electrical system that requires system-level filtering. These modules are designed to attenuate high-frequency harmonic noise generated by high-speed switching devices such as IGBTs, as well as noise generated by arc welding, motors, transformers, etc.

FN256-64-52 is a typical power line filter module designed for three-phase EMC low-pass filter applications. It is designed to reduce the amplitude of high-frequency harmonics generated in three-phase systems.

This module has a rated current of 62.5A and surge current rating of 160A. It consists of three parallel filter capacitors, three parallel filter inductors, two high-speed diodes, a line-neutral bypass capacitor, and a current-compensated bypass inductor. These components are arranged in a 6-terminal package. The module has a 72% higher rated current compared to a traditional three-phase filter.

The working principle of the FN256-64-52 power line filter module is based on the fact that the frequency components of the harmonic current are attenuated by the filter inductor, while the line-neutral bypass capacitor can only pass the low-frequency components. The two high-speed diodes, connected to the capacitive filter, prevent the flow of current in the reverse direction.

In addition, the current-compensated bypass inductor ensures that the filter attenuates the target frequencies without causing an undesirable drop in the system’s voltage. All the components of the module are designed to optimize the noise-reduction levels while keeping the size and cost of the module to a minimum.

The FN256-64-52 power line filter module is an efficient and cost-effective way to reduce the system-level high-frequency harmonic noise in three-phase EMC systems. It has a wide range of application fields such as welding power sources, vehicle charging stations, power systems, servo drives, and home appliances.

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