Schneider Electric LK3QU3 Non-Fusible Disconnect Switch

The Telemecanique LK3QU3 is a 400 A, three-pole, non-fusible disconnect switch engineered to safely isolate three-phase power in industrial systems. It provides 600 V AC and 250 V DC ratings and operates at 50/60 Hz, with GS1AW503 lug compatibility for secure, high-current connections. Designed for panel-mount installation with a 15 × 15 mm shaft and GS1AW503-compatible lug connections, this LK3 series unit supports manual isolation of industrial power circuits in demanding environments. It is commonly installed in motor control centers, power distribution panels, manufacturing equipment, process automation systems, and heavy industrial machinery where dependable manual isolation of three-phase circuits is required. Typical applications include manufacturing facilities, conveyor systems, water treatment plants, process industries, HVAC equipment, and industrial control panels. The LK3QU3 also serves as an OEM direct replacement for existing LK3 400 A 3-pole non-fusible disconnect switches when upgrading, retrofitting, or installing new electrical panels.