The SZW26/LW2620 D303.3YN is a 20A 3pole selector rotary cam changeover switch with 12 screw positions. It features a keyoperated mechanism and an indicator light for status visibility, making it suitable for use in control panels and other electrical installations that require secure, multiconfiguration switching. Key benefits Safe, authorized operation: key control prevents unauthorized changes and provides a secure means to lock out the switch. Flexible configuration: 12 screw positions allow flexible wiring and configuration options for multiple circuits. Clear status indication: integrated light provides visibility of the active position or circuit when illuminated. Efficient multicircuit switching: 3 poles enable simultaneous switching of three circuits, supporting reliable panel control. Key attributes Function: Selector rotary cam changeover switch Model: SZW26/LW2620 D303.3YN Current rating: 20A Poles: 3 Screw positions: 12 Operation: Rotary selector with cam changeover Actuation: Rotary with key Illumination: With light Safety feature: Keyed operation for secure control Applications and use cases Control panels in industrial automation: enables selecting among multiple circuit configurations or operating modes from a single device. Threephase or multicircuit switching: suitable for applications requiring simultaneous switching of three circuits in a controlled manner. Maintenance or testing setups: the key provides restricted access to changes, while the indicator light aids in quickly verifying the active position in lowlight environments. This description aligns with the product brand, specifications, model, and features as listed. The SZW26/LW2620 D303.3YN offers a reliable, secure, and visually verifiable switching solution for applications requiring a 20A, 3pole, 12position selector with an integrated key and light.