Actuators and Dampers

MF4, MS4 Series

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Product Bar End

MF4, MS4 Series

Direct Coupled Actuators Non-Spring Return MF4, MS4 Series

Direct Coupled Actuators Non-Spring Return


The Schneider Electric MF4 and MS4 Series DuraDrive™ direct coupled, non-spring return actuators are designed to accept tri-state or proportional control signals from a DDC system or a thermostat for HVAC damper applications. Typical applications include air handling unit dampers and inlet vanes, VAV boxes, and unitary equipment. The actuators range in torque from 35 to 300 in-lb (4 to 34 Nm).


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QtyModelDescriptionIn StockList PriceInternet Price
MC-421 ACT/2POS/2POS/NSR/120V/175 LB-IN/SPDT AUXINFO1,787.001,000.72
MF41-6083 NSR 70 IN-LB (8 NM) TRI-STATE CTRLINFO342.00191.52
MF41-6153 NSR FLOATING 133 IN-LB 24 VACINFO386.00216.16
MF41-6343 FLOATING, NSR, 300 IN-LB, 24 VAC ACTINFO1,388.00777.28
MS41-6043 NSR 1-20VDC 35IN-LB 24VACIn Stock378.00211.68
MS41-6083 ACTUATORINFO480.00268.80
MS41-6153 PROP. 4-20 MA, NSR, 133 IN-LB, 24 VAC ACTINFO585.00327.60
MS41-6340 NSR 300 IN-LB (34 NM) PROP CTRL 120VACINFO1,848.001,034.88
MS41-6343 PROP. 4-20 MA, NSR, 300 IN-LB, 24 VAC ACTINFO1,610.00901.60


No accessories found
  • Direct mount to round or square shaft
  • Manual override on all models
  • Compact, lightweight design
  • Tri-state and proportional control models

Supply Voltage:21-28 VAC 50/60 Hz

 :MS41-6340 120 VAC 50/60 Hz

Motor:Brushless DC


 :MF4E Screw terminals

 :All others 24" (0.6 m) pigtails, 18 AWG

Action:Non-Spring Return


Manual Override:

 :35, 70 in-lb Disengage button

 :133, 300 in-lb Crank

Resolution:100 steps

Life Expectancy:100,000 Full Strokes

Noise: <60dB @ 3' (1m)

Operating Temperature:

 :MF4E -22° to 140°F (-30° to 60°C)

 :All others -25° to 130°F (-32° to 55°C)

Operating Humidity:5 to 95% RH

Approvals:CE, C-tick (varies with model), UL FIle #E9429 (varies by model)

Warranty:5 years