Schneider Electric (Barber Colman) MA-405-500 Actuator

The Schneider Electric (Barber Colman) MA-405-500 is a heavy-duty two-position oil-submerged actuator engineered for precise control of dampers, valves, and specialized HVAC linkages. Operating on 120V AC, this power-return unit delivers 16 lb-in torque, ensuring reliable fail-safe operation in demanding commercial environments. As a legacy-standard component, the MA-405-500 serves as the direct replacement for MA-405-191, maintaining the same form factor and wiring footprint to minimize field installation time. This model features an integrated SPDT auxiliary switch for end-of-travel signaling or equipment interlocking. The die-cast aluminum housing is designed to be mounted in any position, though a horizontal output shaft orientation is preferred to optimize the internal oil-submerged gear train's longevity. With a 25-watt power consumption, this electric actuator remains a staple for technicians servicing Barber Colman legacy systems requiring high-cycle reliability.

• Direct Replacement: Seamlessly replaces the MA-405-191 without requiring linkage modifications.
• Integrated Auxiliary Switch: Includes a factory-installed SPDT switch for simplified sequencing and feedback loops.
• Versatile Mounting: Universal mounting capabilities allow for installation in constrained mechanical spaces.
• Oil-Submerged Gears: Internal components are permanently lubricated in an oil bath to ensure consistent heat dissipation and reduced mechanical wear.
• High Torque Output: Provides a steady 16 lb-in torque suitable for small-to-medium damper assemblies and valve bodies.

Common Questions

Is the MA-405-500 compatible with older Barber Colman control systems?
Yes, this unit is specifically designed for two-position control and is a standard drop-in for legacy Barber Colman and Schneider Electric installations, particularly those replacing the MA-405-191.

What is the benefit of the oil-submerged design in this actuator?
The oil bath provides superior lubrication and thermal regulation for the gear train and motor, which is critical for MA-400 series actuators used in high-ambient temperature applications.

Can I install this actuator vertically?
While the MA-405-500 can be installed in any orientation, a horizontal shaft position is recommended by factory specifications to ensure the internal oil levels provide optimal coverage for the primary drive gears.

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.