Allen-Bradley SK-U1-MCB1-A1 Main Control Board

The SK-U1-MCB1-A1 is Allen-Bradley’s official replacement Main Control Board Kit for PowerFlex 400 drives, covering PF400 frames D through H. As a Main Control Board assembly, it provides the drive’s central processing and I/O management, and listings describe the kit as including the LCD display interface for local monitoring. Designed for service and maintenance, this replacement lets PF400 drives be restored to operation without replacing the entire unit. Compatible with PF400 series frames D–H, the kit is commonly used in industrial applications such as conveyors, pumps, compressors, mixers, and fans where compact, robust motor control is required. Being a genuine Allen-Bradley part, SK-U1-MCB1-A1 is documented as the PF400 main control board replacement for PF400 D-H frame configurations in distributor catalogs and Rockwell literature. When installing, ensure the drive is de-energized and follow all appropriate safety and wiring procedures as specified by the manufacturer.