Schneider Electric MS40-7043 Proportional Damper Actuator 24V

The MS40-7043 is a 24V AC proportional damper actuator built for direct-mount installation on HVAC dampers and valves. It delivers 35 lb-in of torque with a 2-10 VDC proportional control signal, reversible rotation, and a die-cast housing rated for hardwired, low-voltage operation at 60 Hz. A visual position indicator allows technicians to confirm damper position at a glance. It is suited to proportional control applications across split systems, heat pumps, package units, furnaces, air handlers, and rooftop units in residential or commercial settings. This actuator is an OEM replacement compatible with Schneider Electric, Barber Colman, and TAC equipment, and cross-references to OEM part numbers MS40-7043-501, MS40-7043-MP, MS40-7043-MP5, and MS40-7043-MPX. It replaces actuators showing symptoms such as damper not responding to control signal, stuck positioning, or inconsistent movement. Manufactured in the USA and backed by a 5-year warranty, installation requires a qualified HVAC professional due to direct-mount wiring and calibration to the proportional control signal.