Emi Filter - Component Catalog

Part Family: Electronic Components

Manufacturers: EMI Filters are manufactured by Bourns, Vishay Dale, TDK, Eaton, J.W. Miller, Murata Electronics, API Delevan, and TE.

Functionality of EMI Filters

EMI (Electromagnetic interference) is used to block harmful interferences and allow for a fixed flow of power. EMI takes place by distorting the function of the device which disrupts the device and causes temporary malfunction or permanent damage to the device. EMI also emits an electromagnetic noise that travels through the air. To control the noise EMI Filters are used to mitigate the high frequency. As devices continue to improve performance, they operate at higher frequencies and produce electromagnetic noise. EMI filters suppress the noise with two types of components, capacitors, and inductors. Capacitors impede the current while allowing an alternate current to pass. Inductors reduce the voltage of the frequency by holding energy in a magnetic field as electric current passes.

Common Applications

EMI’s are used in almost every electronic device. EMI filters are used commonly for many residential devices such as cellphones, laptops, baby monitors, microwaves, heaters, and more. As more devices are developed, the demand for EMI filters continues to grow. They are also used in application for Military and Aerospace systems, energy management systems, computers, medical devices, and many more. Just about every electronic device requires EMI filters.

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