Johnson Controls M9203-BUA-2 Actuator

The Johnson Controls M9203-BUA-2 is a professional-grade spring return direct coupled actuator designed for reliable on/off control of dampers in high-performance HVAC systems. Built for heavy-duty operational environments, this electric spring return actuator delivers a consistent 27 lb-in torque (3 N-m) to ensure positive closure even during power loss. Its wide-range 85-264 VAC power supply compatibility makes it a versatile choice for various line voltage applications, eliminating the need for step-down transformers. This model features a microprocessor-controlled brushless motor to prevent stalling and an integrated 48-inch 18 AWG appliance cable with 1/2-inch conduit connectors for streamlined field wiring. Designed for direct mounting, the M9203-BUA-2 eliminates the need for complex damper linkages, fitting securely onto round shafts from 1/4 to 1/2 inch or square shafts from 1/4 to 5/16 inch via its universal self-centering clamp. With a rapid power-on run time of less than 75 seconds and a spring return time under 25 seconds, it provides precise two-position control for critical ventilation and air conditioning sequences.

• Universal Voltage Compatibility: Operates seamlessly on any line voltage from 85 to 264 VAC at 50/60 Hz.
• Fail-Safe Reliability: The mechanical spring return system ensures the damper returns to its home position immediately upon power failure.
• Simplified Installation: Direct-coupled design with a self-centering shaft clamp reduces labor time and hardware requirements.
• Durable Enclosure: Rated NEMA 2 (IP54) for protection against dust and water spray in various mounting orientations.
• Precision Stroke: Provides 95 degrees of rotation with adjustable mechanical stops to limit stroke in 5-degree increments.

What shaft sizes is this actuator compatible with?
The unit includes a universal clamp that fits round shafts from 1/4" to 1/2" diameter and square shafts from 1/4" to 5/16".

Does this model include an auxiliary switch?
No, the M9203-BUA-2 is the standard model with no auxiliary switches. For integrated switching, the BUB models are typically required.

Can this be used for proportional control?
No, this is a two-position (on/off) actuator. It is designed for applications requiring fully open or fully closed damper states.

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.