Allen-Bradley 800T-H42 Selector Switch Maintained

The Allen-Bradley 800T-H42 is a 30 mm diameter, two-position selector switch from the 800T family designed for panel installations in industrial control systems. It provides a maintained (latching) operator that remains in the selected position until manually changed, making it suitable for signaling and mode selection in control circuits. The “H42” variant specifies a cylinder-locking actuator with key removal on the right, enabling secure, authenticated changes of state. As part of the 800T line, this selector switch uses the standard 30 mm footprint and is typically paired with compatible 800T accessories to build multi-function operator stations in machines and process equipment. Typical applications include selecting operating modes or signaling a controller to distinguish between different states in automated systems, conveyors, and machinery where a robust, mechanically latched selector is required.