FN406B-8.4-02

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Power Line Filter Modules

Power line filter modules are widely used in various industrial and commercial applications to achieve noise suppression. In particular, FN406B-8.4-02 module is one of the most commonly used modules in the marketplace. This article is an introduction to the FN406B-8.4-02 power line filter module and its application field and working principle.

Application Field

FN406B-8.4-02 line filter module is mainly used in equipment which requires electromagnetic compatibility (EMC), to prevent interference and to ensure normal operation of the equipment. It is suitable for all kinds of single phase AC mains and equipment, such as UPS, medical equipment, communication equipment, lighting, valves, electrical instruments and industrial automation equipment. Moreover, the filter module can also be used on AC/DC switching power supplies.

Working Principle

The FN406B-8.4-02 power line filter module is composed of a varistor, capacitor, inductor and other components, which are arranged in a certain way in order to achieve desired results. The varistor is mainly used to limit surge voltage and the capacitors are used to reduce the electromagnetic interference (EMI). The inductors reduce conduction noise and also form a choke on the line.

When AC enters the FN406B-8.4-02 filter module, the energy generated by the inductor will store in the capacitor and when the waveform of the AC reaches the peak, the energy will be released which is known as the "peak current absorption" mode, also known as energy absorption.

The filter module is designed to reduce EMI, RFI, voltage transients and conducted harmonic noise. It restricts the current rise and limits peak voltage to a certain level. Additionally, the filter also protects sensitive electronic equipment from current over-loads and short circuits. The filter module can also attenuate up to 18dB of power line noise.

Conclusion

In conclusion, FN406B-8.4-02 power line filter module is a very important element for EMC requirements. It prevents power line disturbances from entering or leaving the system, thereby reducing interference among electronic interconnection. The filter module is also used to protect sensitive electronic equipment from current over-loads and short circuits. Therefore, it is widely used in various industrial and commercial applications to achieve noise suppression.

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