Schneider Electric (Barber Colman) MC-431 Motor

The Schneider Electric MC-431 is a high-torque 2-position electric damper actuator engineered for precise control in commercial HVAC systems, including air handlers and rooftop units. Operating on a 120V motor, this unidirectional actuator provides 220 lb-in torque to drive large dampers or valves where a spring return is not required. Designed for immediate field application, the MC-431 serves as the direct replacement for EA-31, MC-441, and MC-451 models, featuring a 180-degree stroke cycle completed in 30 seconds. This unit comes standard with a factory-set, adjustable SPDT auxiliary switch (cam-operated) to provide feedback or sequence additional equipment at mid-stroke or end-of-travel.

Built with a rugged die-cast aluminum housing and an oil-immersed gear train, this Barber Colman motor is designed for high-duty cycles and industrial longevity. The three-wire control circuit accommodates SPDT snap-acting switches, thermostats, or manual override relays. Whether you are performing a retro-fit or a new installation, the MC-431 ensures reliable non-spring return actuator performance without the complexity of modern digital interfaces. Professionals trust the Schneider Electric MC-431-0-0-1 for its straightforward mechanical reliability and seamless integration into existing 120V HVAC motor circuits.

• High Torque Capacity: Delivers 220 lb-in of force, ideal for controlling large environmental dampers and industrial valves.
• Direct OEM Compatibility: Engineered as a drop-in replacement for legacy EA-31, MC-441, and MC-451 components.
• Integrated SPDT Switch: Features a built-in auxiliary switch for simplified interlocking and system status monitoring.
• Industrial Construction: The oil-immersed gears and aluminum housing provide superior thermal management and wear resistance.
• Fast Response: Achieves a full 180-degree rotation in 30 seconds for responsive airflow or fluid control.

Is the MC-431 a spring-return actuator?
No, this is a non-spring return, two-position motor. It requires power to move to either position and will remain in its last position upon loss of power.

Can I adjust the stroke of the MC-431?
The motor is designed for a fixed 180-degree clockwise rotation; however, the auxiliary SPDT switch is cam-operated and can be adjusted to trigger at various points during the stroke.

What is the primary difference between the MC-431 and legacy EA or MC models?
The MC-431 incorporates modern Schneider Electric manufacturing standards while maintaining the exact physical footprint and electrical requirements of the older Barber Colman units for seamless site upgrades.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.