The RPS-400-48 is a 400W AC/DC power supply produced by Mean Well. It is a 1U, low profile size switch mode power supply that accepts a wide range of input voltages from 90-264Vac. It provides an adjustable output voltage from 1.5-48Vdc, a constant current output up to 10A, and a PFC design for high efficiency up to 94.5%. The RPS-400-48 includes a built-in fan, temperature control, under voltage protection and short circuit protection. Additionally, it has a built-in active power factor correction (PFC) circuit that meets EN61000-3-2 Class D standards and does not require an external PFC circuit. This makes the power supply compatible with high efficiency applications. The RPS-400-48 is designed for industrial applications and its output ripple is low, making it suitable for use in communication systems, instruments, automation, and other types of applications.