Working principle: At the beginning of the power supply, the load will be powered through the negative temperature coefficient thermistor to limit the instantaneous current of the power supply. This effectively inhibits the impact of inrush current on the line and on other electrical appliances, as well as avoiding instantaneous high current shock to the load and extending the life of the load.
Note: The soft start board is only used to limit the start-up current to prevent inrush, and the power is turned on when the power is turned on. It is not a time delay switch. If you need to turn on the power for a period of time, please use a time delay switch.