Belimo TFCB120-S Motor Actuator

The Belimo TFCB120-S is a high-performance spring return actuator designed for on/off control in HVAC applications requiring reliable fail-safe operation. Operating on a 120V AC power supply, this actuator delivers 22 in-lb of torque, making it an ideal solution for smaller dampers and valves where space and energy efficiency are critical. With a motor run time of 75 seconds and a spring return time of less than 35 seconds at ambient temperature, the TFCB120-S ensures rapid response during power loss. This model includes an integrated auxiliary switch for position signaling, enhancing system feedback and automation control. Built with a rugged NEMA 2 housing, it withstands demanding mechanical room environments. The direct-coupled mounting design simplifies installation, reducing labor time for contractors during field replacements or new system integration. This actuator is engineered for long-term reliability in constant volume or variable air volume (VAV) systems.

• Fail-Safe Security: Mechanical spring return ensures the damper or valve returns to its safe position during power interruptions.
• Precise Feedback: Built-in SPDT auxiliary switch allows for easy verification of actuator position and interlock sequencing.
• Low Power Consumption: Optimized for energy efficiency during holding, reducing the overall electrical load on the control circuit.
• Compact Profile: Small footprint allows for installation in tight spaces where standard large-torque actuators cannot fit.
• Simplified Wiring: 120V AC operation eliminates the need for additional step-down transformers in many retrofit applications.

How do I adjust the auxiliary switch on the TFCB120-S?
The integrated switch is fixed to trigger at a 10-degree angle to provide consistent signaling of the end-stop or safety position.

Can this actuator be mounted in any orientation?
Yes, the TFCB120-S supports multi-position mounting, though it is standard practice to avoid upside-down orientations where moisture could collect in the housing.

What is the maximum damper area this 22 in-lb actuator can drive?
Typically, this unit handles dampers up to approximately 4 to 5 square feet, depending on the damper blade seal friction and air velocity specifications.

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.