This paper introduces a mathematical framework for defining the DC capacitor utilization rate in reconfigurable circuits, enabling fair and consistent benchmarking. The proposed method defines a base capacitor, partitions it into discrete segments, and systematically allocates them across different operating modes to equalize electrical stress. This framework identifies optimal capacitor placement and enables accurate estimation of conduction loss and voltage ripple, two key indicators of cost and overall performance, which together form the basis of a consistent ranking methodology. Building on this concept, a new reconfigurable rectifier with ×1, ×2, and ×4 gain modes is proposed. The design achieves high DC capacitor utilization while minimizing diode conduction losses. Comparative evaluation against state-of-the-art topologies with similar gains, supported by comprehensive analytical and experimental validation, demonstrates the effectiveness of the proposed approach. The experimental prototype delivers 1\,kW over an 80\,V–600\,V output range and achieves a peak efficiency of 96.5\%.
