Ntc thermistor inrush current limiter tks sck 102r55ms a 25omega 5a power ntc thermistor designed to be used as an inrush current limiter presenting a high resistance at low temperature the device will limit the initial inrush of current on circuit activation after a certain amount of time the resistance of the thermistor will reduce and allow more current to flow suitable for applications such as switch mode power supplies motors transformers halogen lighting led driver circuits