The 30V 20A single output DC power supply is a switching power supply with LED digital display. It has the characteristics of high accuracy, high efficiency, light weight and energy saving. It also has various protection functions, such as protecting the test load and power supply from damage such as overvoltage, overheating and overload. It can be used as a power supply for constant voltage and constant current DC power supplies. In addition, it can automatically switch between constant voltage and constant current operating modes. It can also be used for testing and aging LEDs, and is widely used in laboratories, production lines, such as motor manufacturing, PCB manufacturing, batteries, electroplating, motor charging, automotive electronics, DC fans, etc.