Schneider Electric (Barber Colman) M333A00 Actuator

The Schneider Electric (Barber Colman) M333A00 Actuator is a 24VAC proportional non-spring return actuator engineered for precise modulation in demanding commercial HVACR environments. Built on the SmartX platform, this model serves as the direct replacement for M133A00, featuring significant mechanical upgrades including a robust gear train with increased face width and stainless steel bearings to ensure long-term reliability in valve and damper assemblies. Designed for seamless integration with VBB and VBS series ball valves, the M333A00 utilizes DIP switch selectable control signals, supporting 0-5 VDC, 0-10 VDC, 5-10 VDC, and 4-20 mA ranges. The inclusion of a terminal block connection simplifies field wiring, while the built-in timeout function prevents continuous motor operation at the end of the stroke, protecting the internal synchronous motor. With a NEMA 2 rated polymer housing and a tool-less PopTop installation design, this actuator is a standard choice for fan coils, heat pumps, and unit ventilators.

• Enhanced Compatibility: Serves as a direct replacement for Barber Colman M133A00 units, ensuring a drop-in fit with existing Schneider Electric SmartX valve bodies.
• Field Flexibility: Features DIP switch selectable proportional control (0-10V, 4-20mA) for rapid configuration without software or specialized tools.
• Advanced Protection: Integrated timeout feature automatically kills power after reaching end-of-travel to preserve the motor and gear components.
• Contractor Grade Durability: Equipped with a non-spring return (NSR) mechanism and a reinforced drive train for stable performance in high-cycle hydronic applications.
• Simplified Wiring: Features a high-integrity terminal block and supports standard 1/2" conduit connectors for secure, professional installation.

Is the M333A00 compatible with my old M133A00 wiring?
Yes, the M333A00 is the direct replacement for M133A00. It retains the same form factor and is designed to work with the same valve bodies, though we recommend verifying the proportional control signal settings via the internal DIP switches during commissioning.

What happens if the actuator loses power?
As a non-spring return actuator, the M333A00 will fail-in-place. If your application requires a specific fail-safe position (open or closed) upon loss of power, a spring-return model would be required.

How do I adjust the control signal on this unit?
The SmartX M333A00 features an easy-access door that allows technicians to set the proportional control signal range (e.g., 0-10 VDC or 4-20 mAdc) and choose between direct or reverse acting modes using DIP switches without removing the entire cover.

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.