A high voltage sign ballast capacitor assembly is disclosed. The assembly includes two components for the sign ballast operation, namely a main capacitor element for power factor correction and up to six starting capacitors for aiding in starting under cold weather conditions. The main capacitor element is arranged and configured to divide the necessary capacitance into several capacitors connected in series. By doing so, the voltage is divided across each of the series capacitors resulting in reduced voltage stress and a reduction in the risk of corona arcing. The assembly is preferably constructed as a modular printed circuit board and a sleeve that houses the circuit board. The circuit board allows for the incorporation of multiple lead configurations, multiple start capacitors, and bleed resistors.