Schneider Electric MS40-7043-MP Spring Return Damper Actuator 35 lb-in 24V 6-9VDC Proportional Control

The Schneider Electric (Barber Colman) MS40-7043-MP is a spring return actuator that provides proportional modulation control of dampers and valves in HVAC systems. This DuraDrive direct coupled actuator delivers 35 lb-in (4 N-m) of torque and operates on 24 VAC/DC power with a 6.6 VA consumption.

Key Features:

• Modulating control for 6 to 9 VDC proportional input signals
• True mechanical clockwise or counterclockwise spring return operation for reliable fail safe application and positive close-off in air tight damper applications
• NEMA 2 (IEC IP54) environmental protection rating
• 22 to 30 VDC, 24 VAC/VDC power input voltage with 3 ft appliance leads
• Universal clamp included for shafts up to 5/8" diameter or 1/2" square
• Operating temperature range: -22 to 140°F (-30 to 60°C)

This actuator is designed for both damper and valve control applications in commercial HVAC systems, air handling units, and variable air volume systems. The spring return feature ensures fail-safe positioning during power loss, making it ideal for critical air flow control and safety applications. UL 873 listed and CUL approved for reliable performance in demanding environments.