Schneider Electric (Barber Colman) MA-418-500 Actuator

The Schneider Electric (Barber Colman) MA-418-500 is an industrial-grade two-position actuator designed for the heavy-duty control of dampers, valves, and ventilation equipment. Operating on 120V, this spring return actuator provides a robust 60 lb-in torque output, ensuring a reliable fail-safe return to the normal position during any power interruption. This model is engineered with a rugged die-cast aluminum housing and an oil-immersed motor and gear train to withstand demanding mechanical loads in commercial HVACR environments.

For high-performance system integration, the MA-418-500 features a built-in SPDT auxiliary switch, making it a critical component for signaling or interlock functions. Technical requirements dictate that the output shaft must be horizontal for proper mounting to maintain lubrication and prevent premature wear of the internal gear assembly. This unit is the direct replacement for the MA-408-500, along with variants MA-418-500-0-2, MA-418-500-0-3, and MA-418-500-0-4. With a 70-watt running input that drops to a 25-watt holding draw, it delivers consistent efficiency for building automation and air handling applications.

• High torque reliability: Delivers 60 lb-in of torque for positive closure and control of large damper assemblies.
• Integrated fail-safe: Reliable spring return mechanism ensures equipment returns to a safe state upon loss of power.
• Precision feedback: Features an internal auxiliary switch for seamless integration into control logic and monitoring systems.
• Industrial durability: Die-cast aluminum construction protects the oil-immersed gear train for extended service life.

Common Questions

Can I mount this actuator in any orientation?
No. The MA-418-500 is precision-engineered for specific mounting; the output shaft must be positioned horizontally to ensure proper lubrication and mechanical alignment.

Is this a suitable replacement for older Barber Colman models?
Yes, this unit is a direct technical replacement for legacy models including the MA-408-500 and various MA-418-500-0-X series variants.

What type of controller is compatible with this unit?
This 120V actuator is compatible with standard SPST control devices commonly found in industrial HVAC and process control systems.

This item is not eligible for free shipping.

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.