The Eaton PRL1X 72CCT 400A INT 3P4W AL MLO is a high-quality circuit breaker interior designed for panelboard applications. Part of the Pow-R-Xpress program, it offers robust performance with a 400A current rating and a 72 frame size. This 3-pole, 4-wire interior is built for reliability and ease of installation with screw terminals and a panel mount design. It is suitable for various operating voltages up to 480VAC and operates efficiently within a wide temperature range..This Eaton PRL1X 72CCT 400A INT 3P4W AL MLO is a 3-pole, 4-wire circuit breaker interior with a 400A current rating and a 72 frame size. It features a panel mount design with screw terminals and supports an operating voltage of 480VAC. The device is rated for a maximum altitude of 3000m and has a rated insulation voltage of 1000V, with a rated impulse withstand voltage of 8kV. It operates within a temperature range of -20 to +70°C and has a making capacity of 400A. The breaking capacity varies by voltage, with 320A at 440V, 265A at 500V, and 256A at 690V. It also offers a short-time allowable current of 400A for 10 seconds.