The AR22PR-311B is a 3-position maintained selector switch with knob operator manufactured by Fuji Electric. It features a 1NO+1NC (1 normally open + 1 normally closed) contact arrangement and is designed for 45° operation between each position. The switch operates in a maintained mode, meaning it holds its position until manually changed, and is available with or without a transformer for illumination options. This selector switch is part of the AR22 series of command switches, which are widely used in machine tools, industrial machines, control panels, and instrumentation panels for reliable multifunctional control applications. The switch provides improved interfacing with better layout, easier installation, and increased safety in complex control systems.