851-20/010

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Power Line Filter Modules are electrical components designed for electromagnetic interference (EMI) protection within electronic equipment. 851-20/010 is a two-pole Power Line Filter Module that provides high performance from EMI protection from conducted, radiated, and direct injection interference. This article will discuss 851-20/010’s application field and working principle.

Applications of 851-20/010

851-20/010 Power Line Filter Module is suitable for use in a wide range of fields that require EMI protection, such as switch mode power supplies, power controllers, professional lighting systems, and RF receivers. The two-pole filter is also well-suited for use in home audio-visual equipment, such as television, digital video recorders, Electronic Gaming systems, and cable, satellite, and IPTV boxes. 851-20/010 is particularly useful for those operating in the industrial sectors, as it is capable of meeting IEC Inrush Current ratings up to 20A, typical for single phase applications. If more current is required, between line filters can be connected in series to provide the desired current rating.

Working Principle of 851-20/010

The 851-20/010 Power Line Filter Module works on the principle of impedance created by multiple capacitors, inductors, and resistors. With its two-pole filter construction, it is able to provide substantial common mode suppression for greater EMI protection. Along with common mode suppression, differential mode performance similarly provides superior EMI protection for higher frequency applications.The filter module also features opposing connection of two capacitors with one connected to hot and the other connected to neutral, allowing for a more balanced current flow through the device. This balanced current flow prevents the device from becoming over-charged, and further ensures superior performance of the L-C-E (inductor-capacitor-resistor) network. This also enhances its withstand at high voltages, as opposed to single capacitor micro-filtration products that become more prone to failures once the voltage rating exceeds 300V.

Conclusion

In conclusion, the 851-20/010 Power Line Filter Module provides high performance EMI protection from conducted, radiated, and direct injection interfering signals. It is suitable for a wide range of applications, particularly in home audio-visual equipment and industrial power systems. The two-pole filter operates on the principle of impedance created by multiple capacitors, inductors, and resistors, providing balanced current flow for superior EMI protection and voltage withstand.

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