Belimo TFB24-SR Damper Actuator

Belimo TFB24-SR Damper Actuator is a direct-coupled, modulating, spring-return device engineered for reliable HVAC control. It operates on 24 Volt AC/DC and provides 2 W running power and 1 W holding power, delivering 22 in-lb of torque through a 95° rotation for precise damper positioning.

With a 2-10 V DC output signal (0.5 mA), it interfaces cleanly with standard HVAC controllers. The unit is housed in a rugged NEMA 2, IP42 enclosure and measures 3 in W x 3.3 in D x 6.28 in H, featuring a shaft diameter of 1/4 to 1/2 in. It connects via 3 ft of 18 AWG plenum cable with a 1/2 in conduit connector. Operating temperature ranges from -22 to 122 °F. Certifications include UL (Canada and US), UL 60730, CE, CAN/CSA E60730, and ISO 9001.

• Direct-coupled, modulating damper actuator for HVAC control
• Spring-return operation for fail-safe positioning
• 24V AC/DC supply; 2 W running, 1 W holding
• Output 2-10 V DC at 0.5 mA for precise control
• Torque 22 in-lb; rotation 95°
• NEMA 2, IP42 enclosure for indoor durability
• Size 3" W × 3.3" D × 6.28" H; shaft 1/4"–1/2"
• Plenum cable: 3 ft 18 AWG with 1/2" conduit connector
• Operating temp -22 to 122 °F
• UL/CE/CAN/CSA/ISO 9001 compliant