ABSTRACT
Packaging of electromagnetic interference (EMI) filters is a very important subject and is often critical to the performance of the filter and the rest of the electronics that it is protecting. Component placement, proximity, and layout is important in all fields of electronics. The physical layout of the EMI filter for best performance is an enclosure that is long and thin. The full length is much greater than the height and width. he filter’s aspect ratio should be long in length compared with the height and width. The components should run from one end to the other, as in a transmission line, rather than hop back and forth within the filter body. Potting compounds add substantial weight and so should be used sparingly. It is often considered that potting of EMI filters enhance cooling. Most often, potting is added to the filter to tie down the components.
