Leakage current sensor, also known as a residual current device (RCD), is one of the most important electrical safety devices in EV charger solutions. To satisfy new standards including IEC 62955 and IEC 60364-7-722, the charging of electrical vehicles requires residual current sensors to avoid hazardous situations in cases where the vehicle battery (DC) is connected to the home power supply (AC). Generally, AC/DC sensitive residual current sensors can be used where direct current and alternating current circuits are directly connected and therefore AC/DC leakage currents can occur.