Schneider Electric (Barber Colman) MA40-7043-501 Actuator

The Schneider Electric MA40-7043-501 is a high-performance DuraDrive spring return actuator designed for two-position control of dampers and valves in commercial HVAC systems. This 24Vac/Vdc actuator provides a robust 35 lb-in torque capacity, ensuring reliable operation in fail-safe applications. Engineered as the direct replacement for MA40-LF24-501, it features a universal clamp compatible with round shafts up to 5/8" or square shafts up to 1/2". With a power consumption of only 2.9 watts during operation and a 0.8 watt holding draw, it maximizes energy efficiency. This model includes an integrated auxiliary switch for position feedback and signaling. Built for rigorous duty cycles, it maintains NEMA 2 protection and is suitable for both new installations and retrofitting older Barber Colman sequences while ensuring precise mechanical alignment and consistent spring return fail-safe positioning during power loss.

• Universal Mounting: The adjustable clamp eliminates the need for specialized linkages on most standard damper shafts.
• High Efficiency: Low holding wattage reduces long-term operational costs and transformer sizing requirements.
• Integrated Feedback: Built-in SPDT auxiliary switch allows for easy interlocking with fans or secondary HVAC equipment.
• Direct Retrofit: Specifically engineered to replace legacy MA40-LF24-501 units without requiring mounting modifications.

Is the MA40-7043-501 compatible with both AC and DC power?
Yes, this damper actuator is designed to operate on 24Vac ±20% or 24Vdc ±10% power supplies.

What is the fail-safe direction for this actuator?
This is a mechanical spring return unit; the fail-safe direction is determined by the mounting orientation on the shaft.

Can this unit replace old Barber Colman actuators?
Yes, it is the designated high-efficiency replacement for the MA40-LF24-501 series and similar legacy 35 lb-in models.

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.