Schneider Electric (Barber Colman) MP-453 Proportional Actuator

The Schneider Electric MP-453 Proportional Actuator, formerly part of the Barber Colman product line, is a heavy-duty 120V electric actuator engineered for precise modulation of dampers and globe valves. This non-spring return actuator delivers a high output of 220 lb-in torque, ensuring reliable positioning in demanding commercial HVAC environments. Utilizing a 90-degree rotary motion with a 40-second no-load timing, the MP-453 is designed for integration with controllers providing a proportional signal. For technicians performing retrofits or repairs, this unit serves as the direct replacement for EA-57, EMP-453-1, MF-443, MF-453, and 35-575. The inclusion of a SPDT auxiliary switch allows for expanded control sequences, such as end-stop signaling or interlocking auxiliary equipment. Built with a rugged gear train and NEMA 1 rated housing, it maintains calibration and performance under continuous cycling.

Technical Benefits for Contractors

• High Torque Output: Provides 220 in-lb torque to handle larger damper linkages and valve assemblies without stalling.
• Direct Retrofit Compatibility: Streamlines service calls by replacing legacy Barber Colman MP-400 series models and older MF or EA series units.
• Integrated Auxiliary Switch: The internal SPDT switch simplifies field wiring for status feedback and equipment sequencing.
• Terminal Block Connections: Facilitates faster, more secure wiring compared to lead-wire alternatives, reducing installation time on the job site.
• Robust Gear Train: Designed for high-duty cycles in proportional control applications, ensuring long-term stability without frequent recalibration.

Common Questions

Is the MP-453 a spring-return actuator?
No, this is a non-spring return (fail-in-place) model. If your application requires a fail-safe position upon loss of power, a spring-return series must be specified.

What controllers are compatible with this proportional actuator?
The MP-453 is compatible with any controller that provides the appropriate proportional signal for the Schneider Electric MPx-4xx series, frequently used with System 8000 and other legacy Barber Colman control systems.

Can this be mounted in any orientation?
While the gear train is versatile, it is standard practice to mount the actuator in an upright position or horizontally to maintain the NEMA 1 protection rating and prevent debris or moisture ingress.

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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.