FA-004 EMI Audio Filter
FA filters are passive elements intended for suppression of unwanted electrical signals. Their basic feature is insertion loss which is the ability to minimize the level of interference of electrical signals in a specific frequency band. They have a feature of reciprocity, they minimize the conductive disturbances coming from the mains to a given device and coming from the device towards the mains.
Interference suppression is a very complex issue. The growing number of electrical devices using non-linear and semiconductor elements causes an increase in interferences in the power grid. One of the basic difficulties in suppressing interferences is their random nature of the amplitude and frequency spectrum and the frequency of their occurrence. The effectiveness of suppression of interferences conducted by a given filter depends, inter alia, on the type of these interferences and the operating parameters of the device installed behind the filter - the filter load.
FA-... filters are designed based on the specified inductive and capacitive elements combined in a multi-stage system. Filters suppress symmetrical and asymmetrical interferences. In addition to suppression of interferences, they protect the device against typical overvoltages occurring in the low voltage power network.