Belimo TFRB24-3 24V Spring Return HVAC Damper Actuator 18 in-lb SPDT

The Belimo TFRB24-3 is a 24-volt spring return damper actuator designed for on/off and floating control applications in commercial HVAC systems. This reliable actuator provides 18 inch-pounds of torque for controlling dampers up to 10 square feet, making it ideal for VAV boxes, mixing boxes, and ventilation control.

Key Specifications:

• 24 VAC/DC power supply
• 18 inch-pounds (2 Nm) torque output
• Spring return for fail-safe positioning
• SPDT (Single Pole Double Throw) auxiliary switch
• On/off and floating control modes
• 95-second running time for 90° rotation
• Manual override for manual positioning
• Position indication for visual feedback

Features and Benefits:

• Spring return ensures damper returns to safe position on power loss
• Compact design for easy installation in tight spaces
• Auxiliary switch provides feedback for building automation systems
• Proven Belimo reliability for long service life
• UL and CSA certified for North American applications

The TFRB24-3 is suitable for controlling dampers in constant volume and variable air volume systems, providing precise airflow control and energy-efficient operation. The spring return feature makes this actuator particularly well-suited for applications requiring fail-safe operation, such as smoke dampers and outdoor air dampers.