Schneider Electric (Barber Colman) MC-351 Motor

The Schneider Electric MC-351 Motor is a heavy-duty, 24V two-position electric actuator designed for the precision control of dampers and valves in commercial HVACR systems. Built for long-term field reliability, this non-spring return motor features an oil-immersed gear train and motor, ensuring smooth operation and heat dissipation during its 70-second stroke timing. It provides a full 180-degree rotation and delivers a robust 220 lb-in torque rating, making it suitable for large-scale air handling units and fluid control applications where a return-to-normal position upon power loss is not required. As a direct replacement actuator, the MC-351 is the primary upgrade path for legacy Barber Colman EYCC series models, including the EYCC-360, EYCC-503-1, and MC-331. The unit comes standard with a factory-set SPDT auxiliary switch for end-of-stroke signaling and is housed in a rugged NEMA 1 die-cast aluminum enclosure for superior protection in mechanical rooms.

• Universal Compatibility: Engineering-grade direct replacement for discontinued EYCC-360, EYCC-504-1, and MC-321-103 models, minimizing downtime during retrofits.
• Reliable Performance: Oil-immersed gear train reduces mechanical wear and provides consistent 220 lb-in torque for demanding damper automation.
• Integrated Control: Features a standard SPDT auxiliary switch and 3-wire control circuit for seamless integration with thermostats and HVAC relays.
• Industrial Durability: Die-cast aluminum housing with dual conduit knockouts protects internal 24V motor components in harsh environments.

Is the MC-351 a spring-return actuator?
No, this is a non-spring return actuator. It is designed for two-position operation where the motor shaft remains in its last position if power is interrupted.

Which legacy Barber Colman motors does the MC-351 replace?
The MC-351 is the designated HVACR replacement part for several legacy units, specifically the EYCC-360, EYCC-503-1, EYCC-505-1, EYCC-506-1, and MC-331.

What is the typical runtime and rotation for this motor?
This Schneider Electric motor provides a 70-second timing for a complete 180-degree rotation, ensuring controlled movement for air dampers and globe valves.

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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.