The SZL950/3 is a threepole, threeposition cam rotary switch designed for panel mounting. It provides a reliable ONOFFON changeover configuration with a current rating of 50 A and a voltage rating of up to 660 V. The unit includes a panel power knob for easy operation and features 12 screw terminals for secure wiring. Built for durable control in industrial panels, it offers a simple yet flexible solution for multicircuit switching. Key benefits Versatile ONOFFON changeover: three positions allow convenient switching between two active circuits or supplies with a safe off position in the center. current and voltage capability: rated for up to 50 A at 660 V, suitable for demanding power switching in control panels. Multicircuit control in a single actuator: three poles enable simultaneous switching of three independent circuits. Easy wiring and installation: 12 screw terminals provide straightforward connections, aiding quick setup and reliable connections. Panel mount with userfriendly knob: designed for panel mounting and operation via a Power Knob for simple, tactile control. Key attributes Model: SZL950/3 Poles: 3 Positions: 3 (ONOFFON changeover) Current rating: 50 A Voltage rating: 660 V Terminals: 12 screws Mounting: panel mount Control: cam rotary switch with panel power knob Configuration: threepole, threeposition changeover switch suitable for multicircuit control Functional compatibility and use cases Motor and equipment power control: suitable for panels that require rapid switching of a threepole circuit, such as powering a machine's threephase components from two different sources with an off position for safe maintenance. Dualsupply changeover: can switch between two separate power feeds or circuits, with an OFF position available between active states for safe isolation during service. Multicircuit control panels: enables coordinated control of three independent loads from a single operator control, improving panel efficiency and visibility. Two to three examples of practical applications Example 1: A control panel for a small threephase machine uses the SZL950/3 to select between two power sources (Source A and Source B) while providing an off position for maintenance or testing. Example 2: An industrial control cabinet that requires switching three related loads simultaneously, such as a motor, a pump, and a fan, with a dedicated off position when debugging or servicing the system. Example 3: A backup/primary power switching scenario where critical loads can be routed from either main power or a generator, with the center position used to safely isolate all loads for servicing. Installation and safety notes Install only in accordance with applicable electrical codes and safety standards. Ensure the circuit is deenergized before wiring or servicing. Use appropriate conductor sizes for the 12 screw terminals and verify secure terminal connections after installation. Confirm that the wiring configuration matches the threepole, threeposition functionality before operation. This SZL950/3 panel switch provides a robust, straightforward solution for controlling multiple circuits with a single actuator, combining a current rating, a wide voltage capability, and a practical ONOFFON changeover for reliable industrial control.