Какую важную функцию выполняет резистор, стоящий на входе диодного моста импульсного блока питания

In this video, I discuss the important functions of the resistor installed before the diode bridge in various low-power switching power supplies. This resistor, with its very low resistance (about 3 ohms), performs two functions at once. First, it acts as a fuse that burns out during a current overload or short circuit in the power supply's input circuits. The second function of this resistor is to limit the starting current of the smoothing capacitor, which is installed immediately after the diode bridge, the rectifier. Link to the ElectroHobby channel on Yandex Zen - https://zen.yandex.ru/electrohobby Link to the VKontakte group - https://vk.com/electrohobbyru Link to the ElectroHobby website » https://electrohobby.ru