APC Silcon and InfraStruXure UPS AC Power Capacitor Design Application Note

This application note explains how APC's Silcon and InfraStruXure UPS systems are designed to maximize the lifetime of their metallized film AC power capacitors by addressing four critical factors: voltage stress, current pulse handling, peak voltage, and thermal stress. It details specific design strategies such as line-to-neutral connections, capacitor de-rating by at least 37%, common mode choke protection, and forced airflow cooling to mitigate capacitor failures.