Key operated switches provide secure, usercontrolled on/off operation that requires a physical key to operate and remove, helping prevent unauthorized use of equipment. Industrial grade design with robust construction built for demanding environments, offering reliable performance and long service life in control panels and equipment enclosures. Function and usability: simple manual action with clearly defined on and off positions, suitable for controlling machinery, power to equipment, or start/stop functions in control circuits. Compatibility and installation: available in standard panelmount formats with common mounting footprints; multiple actuator sizes and key options are typically offered to fit a range of panel cutouts. Materials and size options: housings available in metal or strength plastics, with various faceplate sizes to suit different installation requirements and space constraints. 23 practical use scenarios: 1) Start/stop control for production line machinery in an industrial plant, ensuring only authorized operators can start machines. 2) Restricted access to electrical cabinets or panels in a factory, preventing tampering or accidental operation. 3) Secure shutoff points in power distribution enclosures or equipment rooms, enabling controlled deenergization during maintenance. Selection guidance: review modelspecific keying options, mounting footprint, actuator length, and electrical ratings to align with your circuit requirements and panel design. Performance considerations: verify the voltage and current ratings for the chosen model and ensure the installation environment matches any environmental protections offered by the housing or seal design.