Allen-Bradley 800MS-H33B Selector Switch Operator

Allen-Bradley 800MS-H33B is an operator component for selector switch assemblies in industrial control panels. As part of the 800MS selector switch family, this lever-style actuator provides the human–machine interaction point that enables an operator to rotate or move the switch to the desired position, initiating a corresponding control signal within an automation circuit. The catalog number 800MS-H33B identifies this specific operator configuration for use with compatible Allen-Bradley 800MS switch bodies and cams, with mounting and engagement defined by the mating hardware in the installation. It is commonly used in machine control panels, process automation stations, and safety-related control points where tactile operator input is required to change machine states or select operating modes. In retrofit projects, technicians replace worn or incompatible operators with the matching 800MS-H33B to preserve existing switch bodies while updating actuation geometry. For best results, ensure the operator is paired with the correct cam code and that the overall assembly meets applicable standards for control enclosures and panel interfaces.