EMI (electromagnetic interference) filter capacitor unit

The unit comprises several rolled capacitor elements in a single case, with a package concept that allows installation mounting and electrical interconnection on the same top plane. A U-shaped feedthrough bus in the form of a wide metal strip is routed from a top input terminal down the center of the case and up adjacent one wall to a top output terminal. The capacitor elements are in two sets on opposite sides of the center portion of the feedthrough bus, and connected thereto. A ground bus serving as an internal noise partition connected to the metal top is between the capacitor elements of one set and the outer portion of the feedthrough bus. A minimum of three units may be used with the variable speed constant frequency (VSCF) converter of the three-phase power supply system of an aircraft, for filtering and suppression of electromagnetic interference. The construction permits use of two input terminals bussed together, and two output terminals bussed together for handling large currents.