DC-Link capacitors are used in high-voltage applications to provide the necessary energy buffer between different DC power stages like a rectifier and a DC-DC Converter, DC-AC Inverter and others. Würth Elektronik eiSos presents the new WCAP-FTDB DC-Link Film capacitors to offer solutions for the high power density future applications in the e-Mobility and renewable technologies. We will provide insights into the calculation of the necessary capacitance and component selection for a DC-Charger application, as well as considering also the use of alternative electrolytic capacitors.