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MSRP: $1,317.00
Price: $493.88
You Save: $823.12 (62 %)


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Actuator Customization180 characters remaining
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Belimo Part Number: EFB120-S
Torque: 270 in-lb [30 Nm]
Signal: On/Off 2 position control
Aux. Contact: Two Built-in SPDT auxiliary switches

Power Supply: 100. . . 240 VAC +10% / -20%, 50/60 Hz, 100. . . 125 VDC 10%

Running Time (motor): 75 seconds

Running Time (fail-safe): <20 sec @ -4 deg.F to +122 deg.F [-20 deg.C to +50 deg.C], <60 sec @ -22 deg.F [-30 deg.C]


Fail-Safe Spring Return
Torque 270 in-lb [30 Nm]
Control Input On/Off
Input Impedance N/A
Position Feedback --
Running Time (motor) 75 seconds
Running Time (fail-safe) <20 sec @ -4°F to +122°F [-20°C to +50°C], <60 sec @ -22°F [-30°C]
Auxiliary Switch 2 x SPDT 3A (0.5A) @ 250 VAC, UL approved, one set at +10°, one adjustable 10° to 85°
Power Supply 24 VAC ± 20%, 50/60 Hz, 24 VDC +20% / -10%
Power Consumption Running: 9.5 W; Holding: 4.5 W
Transformer Sizing 16 VA (Class 2 power source)
Electrical Connection Two 3 ft, 18 GA appliance cables with 1/2" conduit connectors
Overload Protection Electronic throughout 0° to 95° rotation
Shaft Diameter 1/2" to 1.05" round, centers on 3/4" with insert, 1.05" without insert
Angle of Rotation 95° (adjustable with mechanical end stop, 35 to 95°)
Direction of Rotation (motor) Reversible with CW/CCW mounting
Direction of Rotation (fail-safe) Reversible with CW/CCW mounting
Position Indication Visual indicator, 0° to 95° (0° is spring return position)
Manual Override 5 mm hex crank (3/16" Allen), supplied
Humidity Max. 95% RH non-condensing
Ambient Temperature -22°F to +122°F [-30°C TO +50°C]
Ambient Temperature (safety) --
Storage Temperature -40°F to +176°F [-40°C TO +80°C]
Noise Level 56.5 dB (A) motor @ 75 seconds, 71.4 dB (A) spring return
Housing Material Aluminum die cast and plastic casing
Housing NEMA 2, IP54, Enclosure Type2
Agency Listing cULus acc. To UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. To 2004/108/EC & 2006/95/EC
Quality Standards ISO 9001
Weight 10.14 lbs (4.6 kg)

For On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturers specifications. Control is On/Off from an auxiliary contact, or a manual switch. The actuator is mounted directly to a damper shaft up to 1.05 in diameter by means of its universal clamp. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft.
The EFB and EFX series actuators provide true spring return operation for reliable failsafe application and positive close off on air tight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator.
The EFB and EFX series provides 95 of rotation and is provided with a graduated position indicator showing 0 to 95.
The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches.
The EFB120-S and EFX120-S versions are provided with two built-in auxiliary switches. These SPDT switches provide safety interfacing or signaling, for example, for fan start-up. The switching function at the fail-safe position is fixed at +10, the other switch function is adjustable between +10 to +85. The EFB120, EFB120-S, EFX120 and EFX120-S actuator is shipped at +5 (5 from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off.


Item Number: EFB120-S
Manufacturer: Belimo
Manufacturer Part No: EFB120-S

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