The SRW-45-4004 is a rack-mountable switching power supply from Integrated Power Designs. It is rated for a total power output of 45 watts, and provides four regulated outputs at 12V, 9V, 5V, and 3.3V. It features a wide operating temperature range, low noise, and full overload and short-circuit protection. The device is designed to meet the needs of a range of applications, including computing, industrial, and automation systems.