Belimo TFB120 Actuator

The Belimo TFB120 Actuator is a high-performance spring return damper actuator designed for reliable on/off control in commercial HVAC systems. Operating on a universal 120Vac (100-240V) power supply, this 22 in-lb torque motor provides consistent fail-safe positioning, ensuring dampers return to a safe state during power loss. Engineered for direct-coupled mounting, it handles shafts from 1/4" to 1/2" with its universal clamp, eliminating the need for complex linkages. The brushless DC motor is controlled by an ASIC and microprocessor, offering overload protection throughout its entire 95-degree rotation without requiring mechanical limit switches. This NEMA 2 rated unit is ideal for tight mechanical rooms, featuring a compact housing and a 75-second run time. As a veteran-grade HVAC damper control solution, the TFB120 ensures simplified installation and long-term energy efficiency with a low holding power consumption of 1.3W, making it a staple for contractors managing air-side automation.

• Fail-Safe Reliability: True mechanical spring return ensures positive close-off on airtight dampers during power outages.
• Universal Voltage: Flexible 100-240V AC input accommodates various field power requirements without extra transformers.
• Precision Control: Integrated microprocessor provides constant torque and a digital rotation sensing function to prevent motor burnout.
• Easy Installation: Tool-free manual override and a graduated position indicator simplify field commissioning and troubleshooting.
• Durable Construction: NEMA 2/IP42 rated housing supports installation in challenging ambient environments from -22°F to 122°F.

Can this actuator be mounted for both CW and CCW fail-safe?
Yes, the direction of rotation for fail-safe operation is easily reversible by simply flipping the actuator over during mounting.

Does the TFB120 require an electrical ground?
No, this unit is double-insulated and does not require a ground connection to meet agency standards.

What damper size is this actuator rated for?
The 22 in-lb torque is typically suitable for dampers up to approximately 4 square feet, though you should always verify the damper manufacturer’s torque requirements based on seal type and air velocity.

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.