Inrush current limiting

One possibility of avoiding high inrush currents is the use of so-called "electronic zero-cross switches" which prevent switching on in case of momentary high voltage. Semiconductor protection manufacturers’ planning notes must be observed (see also chapter ).

Another possibility is to limit inrush current via NTC elements (thermistors) as used, among other things, in entertainment electronics’ switching power supplies (e.g. televisions). For this, it is important to observe that the NTC resistance limiting inrush currents while switching absorbs electrical power at every switching action and heats up in the process. Switching on and off multiple times over short periods of time leads to the NTC resistance overheating and possibly getting destroyed.