Industrial switching power supply is used for power supply of industrial equipment. Electronic switching devices such as transistors, field effect transistors, silicon controlled thyristors, etc. are used to "turn on" and "turn off" electronic switching devices constantly through control circuits, so that electronic switching devices can pulse the input voltage, thus realizing copyDC/AC, DC/DC voltage conversion, and adjustable and automatic voltage stabilization of output voltage. Safety capacitors, metal film capacitors, thermistors, varistors, ceramic capacitors and other series of products are widely used in industrial switching power supplies.