An electrical power conditioning device for transmitting energy between a source and a load includes an inner conductor that extends within a grounded outer conductor. A low-pass filter extends between the inner and outer conductors and is designed to attenuate high frequency energy transmitted by the inner conductor. The low-pass filter includes at least one capacitor array which comprises multiple capacitor sectors mounted on a common a printed circuit board in a radial arrangement, each sector including a T-shaped configuration of ceramic capacitors to provide operational redundancy. Additionally, a voltage suppressor extends between the inner and outer conductor and suppresses transient voltages transmitted by the inner conductor. The suppressor includes a pair of printed circuit boards between which a plurality of diodes extend in a circular array around the inner conductor, the printed circuit boards electrically connecting the diodes in series to allow for higher overall pulse current capabilities.