The SZW26/LW2663 rotary changeover cam switch is designed for 3 phase electrical systems and provides a reliable manual switching solution. It features an ON OFF ON action with a center off position, enabling safe isolation and straightforward transfer between two circuits or power sources. Rated for 63 A at up to 660 V AC, it includes 12 terminals and carries the D303.3 mounting code for easy integration into control panels. Key benefits Handles 3 phase loads with a current rating of 63 A and voltage rating of 660 V AC for industrial control applications. ON OFF ON configuration offers a center off position for safe isolation during changeover. 12 terminals support versatile wiring configurations, enabling flexible 3 phase connections. Compact form with D303.3 mounting code facilitates integration into standard control panels. 1 piece per pack, suitable for replacing or upgrading existing cam switch installations. Built for industrial use with a robust rotary cam switching mechanism suitable for frequent operation. Key attributes Model: SZW26/LW2663 Type: Rotary changeover cam switch Positions: ON OFF ON Phases: 3 phases Terminals: 12 Current rating: 63 A Voltage rating: 660 V Mounting code: D303.3 Pack quantity: 1 piece Brand/line: SZW26/LW26 Application: Suitable for 3 phase control in industrial electrical panels and machines Applications and use cases Transfer switching in a 3 phase control panel to select between two power sources (for example mains and a backup supply) with a safe center off position. Primary control of a 3 phase motor or equipment where a simple manual changeover between two feeds is required. Integration in industrial machinery to switch between two circuit paths for maintenance, testing, or operational mode selection while providing an isolated off position for safety. Notes Material details are not specified in the product title. This description reflects the model, functions, ratings, terminals, and mounting code as provided.