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

The Schneider Electric (Barber Colman) MS40-7043 is a 24-volt proportional damper and valve actuator designed for precise modulating control in HVAC applications. This spring return actuator delivers 35 lb-in of torque with a 95-degree rotation range, making it ideal for damper control and globe valve applications requiring reliable fail-safe positioning.

Key Specifications:

• Voltage: 24V AC or 22-30V DC operation
• Torque: 35 inch-pounds rotational force
• Control Signal: 2-10V DC or 4-20mA proportional control
• Power Consumption: 4.2W running, 2.4W holding
• Rotation: 95-degree angle with mechanical spring return
• Shaft Size: 5/8-inch diameter for direct mounting
• Enclosure: NEMA 2 rated die-cast housing
• Operating Range: -22°F to 140°F ambient temperature

Features and Benefits:

• True mechanical spring return operation ensures positive close-off in fail-safe and air-tight applications
• Direct mount capability to round or square damper shafts eliminates complex mounting hardware
• Visual position indicator provides at-a-glance confirmation of actuator position
• Selectable direct acting or reverse acting control modes on proportional models
• Overload protection throughout full rotation range prevents damage
• Adjustable rotation limiting allows customization for specific applications
• Rugged die-cast housing withstands demanding HVAC environments

The MS40-7043 includes a 3-foot plenum-rated cable with 1/2-inch conduit connector for easy electrical integration. UL 873 listed and CSA certified for both US and Canadian installations, with additional CE and C-Tick approvals for international applications.