Overview
The Belimo TFB120 is a line-voltage spring return damper actuator designed for on/off fail-safe control of air dampers in commercial HVAC systems.
Features
- Direct line voltage operation (100 to 240 VAC) without requiring a step-down transformer
- Mechanical spring return ensures reliable fail-safe damper positioning
- Compact footprint allows mounting in tight air handling units and ductwork
- Simple direct coupling to damper shafts with universal clamp
Specifications
- Torque: 22 in-lb [2.5 Nm]
- Nominal Voltage: AC 100…240 V
- Control Type: On/Off
- Actuator Type: Spring Return
- Damper Area: Up to 5.5 sq ft
Applications
- Line-voltage fail-safe air damper control in HVAC systems
- Safety closure, exhaust air dampers, and ventilation control



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