What is a Line filter?

A line filter is a filter that removes noise generated from equipment and noise coming from external equipment by inserting it into the power supply line of the equipment. It is also called a noise filter because it is used for the purpose of removing noise. In general, the emission of noise is called EMI (Electromagnetic Interference), and the emission of noise from external devices is called EMS (Electro Magnetic Susceptibility). Furthermore, various devices are required to be designed to suppress noise generation by themselves and not be affected by noise from peripheral devices. This is called EMC (ElectroMagnetic Compatibility). A line filter is a filter used to realize this EMC, and it is used in the power supply line inside the device or outside the device.

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