When components are used in series, voltage balancing is usually required. The circuit form of voltage balancing is shown in Figure below

1.In order to ensure that the voltage on the component is balanced, the current flowing through the voltage balancing loop is usually required to be more than 10 times the leakage current in the component loop (high temperature), in order to determine the size of the voltage balancing resistance, but in practice, generally choose 3 ~ 5 times, in short, the larger the better.

2.When the input is AC voltage, voltage equalization is based on resistance and capacitance absorption, static voltage equalization resistance can take larger resistance value, to use high voltage resistance, power can take smaller, resistance and capacitance absorption resistance can use ordinary resistance, because the capacitor bears the main part of the voltage; When the input is DC voltage, resistance and capacitance absorption can basically be omitted, but the resistance of static voltage balancing should be selected well, and the resistance value should be selected to a smaller value to ensure voltage balancing.