The SZL920/3 GLE9 ON OFF ON 3 Phase Selector Electrical Rotary Cam Switch is a threeposition rotary switch designed for reliable phase selection in threephase equipment, including welding machines. It features ONOFFON operation and is suitable for use on 20A welding machines, delivering simple, robust control for threephase circuits. Key benefits Clear ONOFFON operation provides straightforward power control and safe isolation during maintenance. Threephase selector capability enables precise phase selection in a compact, singlecontrol device. 20A current rating supports typical welding machine loads with dependable performance. Rotary cam mechanism delivers smooth actuation and positive engagement for reliable switching. Built for industrial use, offering durable operation in panelmounted control environments. Key attributes Model: SZL920/3 Type: Electrical rotary cam switch for threephase selection Positions: ON, OFF, ON Phase/Poles: 3phase selector Current rating: 20A Application: Used on 20A welding machines; suitable for threephase equipment Mounting: Intended for installation in control panels Applications and use cases Welding machine control: Use to switch power and select operating phases, enabling safe startup, operation, and shutdown of a 20A welding machine. Threephase equipment panels: Implement as a simple, reliable threestate control to start, isolate, or reconfigure a threephase load in industrial panels. Maintenance and service panels: Provide secure isolation with a clearly defined OFF position during routine maintenance or troubleshooting of threephase systems.