Filnor Inc 5309-50-290 Master Switch

The Filnor Inc. 5309-50-290 Master Switch is a rugged manual disconnect designed for high-current circuits in industrial power distribution and motor-control systems. Panel- or equipment-mounted, it provides visible manual isolation for steel mills, mining operations, power distribution panels, crane controls, and other heavy industrial equipment requiring a robust disconnect. This industrial-duty metal assembly is intended for indoor industrial electrical environments and is compatible with power distribution equipment, motor controls, and crane control systems; it carries the manufacturer's part number 5309-50-290 and is produced in the United States. As a legacy product, it is available as used or surplus, and common replacements include Filnor Type A Knife Switch, Filnor Enclosed Disconnect Switch, and Square D Heavy-Duty Safety Switch.