A new approach to power electronic capacitors based on nonlinear dielectrics has been developed. The capacitors made from antiferroelectric (AFE) ceramic exhibit an increase in capacitance with voltage and can be operated to at least 200°C. This unique property allows one to put a very efficient capacitive filter in a very small package. Many different sizes of multilayer AFE ceramic capacitors with 1.2 to 6.8 F maximum capacitance at 520 to 1250V have been successfully fabricated. Ripple current performance tests showed that 6.8 F capacitors work well at 600V 1kHz. When 1.5 F capacitors were tested to 100°C, the peak current was nearly 8A and there was no indication of thermal runaway with a power dissipation of approximately 6W. Prototype modules were successfully fabricated using 1.2 to 1.5 F capacitors by integrating ten capacitors onto circuit boards. These capacitors were performance tested in a power electronics inverter application and compared to polypropylene film capacitors. AFE ceramic capacitors showed better performance with a 76% reduction in volume and 68% reduction in weight.