a power switching assembly having a rear face;

a capacitor bank having a top side and a front face; and

a bus bar having first and second subregions and including positive and negative voltage bus sheets, the first subregion positioned above the capacitor bank with an approximately congruent surface area to that of the top side of the capacitor bank, the second subregion curving along the front face of the capacitor bank and extending into a cavity between the capacitor bank and the rear face of the power switching assembly, the positive and negative voltage bus sheets coated with a dielectric thermal interface material (TIM) to improve at least one of thermal conductivity of the bus bar or electrical insulation of the bus bar, the dielectric TIM including a high thermal conductivity.