Schneider Electric (Barber Colman) MP-423 Actuator

The Schneider Electric (Barber Colman) MP-423 Actuator is a heavy-duty proportional electric actuator designed for precise modulation of dampers, globe valves, and ventilation flaps. Operating on a 120V power supply, this gear-train driven unit provides constant 60 lb-in torque to ensure reliable positioning in demanding commercial HVACR environments. This non-spring return actuator is engineered for high-cycle applications where maintaining the last position upon power loss is preferred over a mechanical return. It features a rapid 13-second timing (at no load) for a full 90-degree rotation, making it ideal for systems requiring quick response times to maintain setpoint accuracy.

For technicians performing field replacements, the MP-423 is functionally identical and a direct cross-reference for the EA-53, EMP-423, and EMP-423-1 models. The unit includes an integrated SPDT auxiliary switch, allowing for easy sequencing or end-switch signaling without the need for external hardware. Encased in a rugged die-cast housing with NEMA 1 protection, the motor and gear train are oil-immersed to reduce mechanical wear and extend service life in wide operating temperature ranges from -40°F to 136°F. This HVAC damper actuator utilizes a terminal block for straightforward wiring and is compatible with various Barber-Colman Microtherm controllers and 100-ohm slidewire feedback systems.

Key Benefits:

• Universal Compatibility: Serves as a direct replacement for legacy Barber Colman EA-53 and EMP-423 series actuators.
• High-Speed Response: Features 13-second travel for 90-degree applications, optimizing proportional control efficiency.
• Integrated Signaling: Includes a built-in SPDT auxiliary switch for simplified system feedback and multi-unit sequencing.
• Industrial Construction: Oil-immersed gears and a NEMA 1 rated enclosure provide durability in mechanical rooms and air handlers.
• Precision Torque: Delivers a consistent 60 lb-in torque rating suitable for small-to-medium damper and valve assemblies.

Common Questions:

Can the MP-423 handle 24V control signals?
The MP-423 is a 120V actuator. While it interfaces with various proportional controllers, ensure the supply voltage matches the 120 VAC requirement to prevent component damage.

Is this a spring return model?
No, this is a non-spring return actuator. It will remain in its last position if power is interrupted, which is often preferred for specific HVACR valve control sequences.

Does it include a feedback potentiometer?
Yes, these Barber Colman proportional actuators typically feature a 100-ohm feedback slidewire for accurate positioning within the control loop.

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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.