Schneider Electric MS40-7043-501 Damper Actuator 24V 35 lb-in Spring Return

The Schneider Electric (Barber Colman) MS40-7043-501 is a proportional electric damper and valve actuator designed for precise HVAC control applications. This 24V modulating actuator delivers 35 lb-in of torque with spring return operation for fail-safe positioning in critical systems.

Key Specifications:

• Power: 24V AC or 22-30V DC operation, 0.15A current draw
• Torque: 35 inch-pounds with 95-degree rotation range
• Control: Accepts 2-10V DC or 4-20mA proportional signals
• Spring Return: True mechanical clockwise or counterclockwise fail-safe operation
• Mounting: Direct mount to 5/8-inch round or square damper shafts
• Connection: 3-foot plenum-rated cable with 1/2-inch conduit connector
• Includes SPDT auxiliary switch for status monitoring

Performance Features:

• Rugged die-cast housing with NEMA 2 enclosure rating
• Overload protection throughout full rotation
• Visual position indicator for easy commissioning
• Direct or reverse acting control modes available
• Adjustable rotation limiting for precise positioning
• Wide operating temperature range: -22°F to 140°F

This Duradrive actuator provides reliable modulating control for dampers and globe valves in commercial HVAC systems. The spring return function ensures positive close-off in air-tight applications during power loss. UL 873 listed and CSA certified for both US and Canadian installations, with CE and C-Tick approval for international applications.