Allen-Bradley 800T-H31A Selector Switch Cylinder Lock

Allen-Bradley 800T-H31A is a 30 mm diameter, non-illuminated two-position selector switch with a built-in cylinder lock and a 1 normally open and 1 normally closed contact arrangement. The H31 designation indicates left-hand key removal, enabling maintenance lockout by removing the key in the selected position to prevent inadvertent operation. Designed for panel mounting in industrial control cabinets, this unit is part of the 800T family and uses standard 800T operators and mounting hardware for straightforward retrofits with other 30 mm Allen-Bradley switches. Typical applications include simple start/stop control and interlock signaling in machinery and process lines, where a keyed selector switch provides secure, auditable operation and a clear, mechanical indication of the control state during both production and maintenance tasks. Because it leverages the 800T ecosystem, it can be paired with compatible lockout accessories and standard wiring schemes to support common safety and control architectures in automation environments.