The GW INSTEK PSU 40-38 is a single-channel programmable laboratory power supply with a voltage range of 0-40 volts DC. It has excellent electrical characteristics, including a high output voltage accuracy, high ripple and noise levels, and a high output power. The PSU 40-38 is also equipped with a number of advanced features such as a digital display, programmable constant voltage and constant current modes, overvoltage and overload protection, current limit and voltage ranges monitoring, programmable power-on sequence, and fan speed control. Additionally, the PSU 40-38 has an auto restart mode, which will automatically restore the power supply after power loss or when the load is disconnected. It is an efficient, reliable and cost-effective choice for applications requiring precise voltage control and current limit.