C4AE MKP DC-Link Box Capacitors KEMET C4AE MKP Box Capacitors are designed for DC-Link applications up to 1300V. The C4AE components feature metalized polypropylene film which provides high capacitance density with self-healing characteristics. These capacitors are designed for printed circuit board (PCB) mounting with either a 2- or 4-lead wire configuration. The 4-wire versions offer lower ESR, providing lower losses in higher frequency operations.