// 500+ Brands

// Authorized Distributor of Over 100 Brands

Belimo TFB24-3

SKU: CS4816911MPN: TFB24-3

Damper Actuator, 22 in-lb [2.5 Nm], Spring return, AC/DC 24 V, On/Off, Floating point

Product Details

Features

  • Easy-to-adjust mechanical stop to limit damper rotation.
  • Cut labor costs with simple direct coupling. Actuator Centers on ½” shaft.
  • Clockwise or counterclockwise fail-safe mounting for fail-safe.
  • Compact size with the shortest shaft-center to edge distance in the industry - 0.77”.
  • True mechanical spring return - the most reliable fail-safe.
  • Single line voltage model for on/off application has 100 to 240V (-15/+10%), 50/60 Hz supply power.
  • Check damper position easily with clear position indicator.
  • Don’t worry about actuator burn-out. Belimo is overload-proof throughout rotation.
  • Need to change control direction? Do it easily with a simple switch (modulating actuators).
  • Built-in auxiliary switch is easy to use, offers feedback or signal for additional device.
  • Microprocessor-controlled brushless DC motor increases actuator life span and reliability, provides constant running time (modulating actuators).
  • Rugged housing withstands rough handling in the mechanical room.
  • 3 ft. standard cable and conduit connector (not shown) eases installation.

The TFB24-3 is used for On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer’s specifications.

The TFB series actuators provide true spring return operation for reliable fail-safe application and positive close off on air tight dampers. The spring return system provides consistent torque to the damper with, and without, power applied to the actuator.

Attributes

Control On/Off Floating point
Fail-Safe Spring Return
Torque 22 in-lb
Nominal Voltage AC/DC 24 V
Transformer Sizing 4 VA (class 2 power source)
Enclosure UL Enclosure Type 2
Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10%
Power Consumption In Operation 2.5 W
Power Consumption In Rest Position 1 W
Electrical Connection 18 GA plenum cable, 3 ft [1 m], with ½” conduit connector
Overload Protection electronic throughout 0…95° rotation
Input Impedance 1000 Ω (0.6 W)
Angle Of Rotation Max. 95°, adjustable with mechanical stop
Direction Of Motion Motor selectable with switch 0/1
Position Indication Mechanical
Running Time (Motor) 95 s constant, independent of load
Running Time Fail-Safe <25 s
Ambient Humidity max. 95% r.H., non-condensing
Ambient Temperature -22…122°F [-30…50°C]
Storage Temperature -40…176°F [-40…80°C]
Degree Of Protection Iec/En IP42
Degree Of Protection Nema/Ul NEMA 2
Connection cable
Servicing maintenance-free
Housing Material UL94-5VA
Nominal Voltage Dc 24 V
Nominal Voltage Ac 24 V
Noise Level, Motor 35 dB(A)
Torque Motor 22 in-lb [2.5 Nm]
Electrical Protection actuators are double insulated
Quality Standard ISO 9001
Noise Level, Fail-Safe 62 dB(A)
Agency Listing cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2014/30/EU Listed to UL 2043 - suitable for use in air plenums per Section 300.22(C) of the NEC and Section 602 of the IMC
Shaft Diameter ¼…½” round, centers on ½”
Fail-Safe Function Spring return
Control Type Web Floating/3-point
Fail-Safe YES

Specifications

SKUCS4816911
MPNTFB24-3