Belimo AMB24-3 Actuator

The Belimo AMB24-3 is a high-torque, non-spring return rotary actuator engineered for precise control of dampers in commercial HVAC systems. Delivering 180 in-lb of torque, this unit effectively manages damper surfaces up to 45 square feet. It supports on/off and floating point control, operating on a universal 24VAC/VDC power supply for maximum field flexibility. Built with a sensorless brushless DC motor, the actuator utilizes an Application Specific Integrated Circuit (ASIC) to monitor rotation and provide electronic overload protection throughout its 0 to 95° stroke, eliminating the need for mechanical limit switches. This model is the direct replacement for the AMB124-3-X1 (where X1 designates an actuator mounted on a valve), ensuring seamless integration during retrofits. The rugged NEMA 2 (IP54) housing includes a manual override button and a reversible rotation switch to simplify commissioning for technicians.

Key Benefits

• High-Torque Performance: Provides 180 in-lb (20 Nm) of constant torque, independent of load, for reliable operation of larger damper assemblies.
• Advanced Motor Logic: Features a brushless DC motor with digital rotation sensing (DRS) to prevent damage during stall conditions and reduce power consumption in holding mode.
• Universal Compatibility: The multi-voltage 24V capability and direct-coupled universal clamp fit shafts from 1/2” to 1.05”, making it a versatile stock item for service vans.
• Simplified Commissioning: Equipped with an external manual override button and a mechanical position indicator for rapid diagnostic testing without power.

Common Questions

How do I change the direction of rotation?
The Belimo AMB24-3 features a built-in reversing switch on the cover. You can toggle between clockwise and counter-clockwise rotation to match your damper’s fail-safe or operating requirements.

Can this unit replace an AMB24-3-X1?
Yes, the AMB24-3 is the direct replacement for the AMB24-3-X1. Note that the X1 suffix originally designated a factory-mounted valve application, but the technical specs and mounting footprint remain compatible for replacement.

Does it require a transformer?
The unit requires a 5.5 VA Class 2 transformer if your control signal and power supply are not already 24VAC or 24VDC. It is designed to be maintenance-free once installed in a NEMA 2 environment.

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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.