Fast Acting, Spring Return Actuator CW, 230v (HVAC) Zoom

Fast Acting, Spring Return Actuator CW, 230v (HVAC)


Brand: Honeywell

ML4125D1005 has been discontinued.
Please contact customer service at
(888) 757-4774 for help finding an alternative.



Actuator Type: Two Position
Torque: 100 lb-in
Fail Safe Mode: Spring Return
Product Type: Actuator

Description for Honeywell ML4125D1005

The ML4125 Fast-Acting, Two-Position Actuators are spring return direct coupled actuators (DCA) with an integral junction box for on/off damper control.


  • Integral spring return
  • -40 C to 130 F (-40 C to 54 C) operating temperature range.
  • No audible noise during holding.
  • Electronic circuitry provides efficient operation while eliminating the need for limit switches.
  • Ninety-five degree angle of rotation.
  • Die-cast aluminum housing. Housing design allows flush mounting to damper.
  • Integral junction box with three conduit openings eliminates need for separate wiring box.
  • Direct mounting to 3/8 or 1/2 in. round or square shaft.
  • Not intended for smoke control systems

  • Fast Acting, Spring Return Actuator (HVAC Applications)
  • Actuator Type: Damper
  • Application Type: HVAC
  • Torque/Force (lb-in., lbf100 lb-in.
  • Torque/Force (Nm, N): 11.3 Nm
  • Fail Safe Mode: Spring Return
  • Control Signal: Two position, SPST
  • Supply Voltage: 230 Vac + or - 10%
  • Number of Internal Auxiliary Switches: 0
  • External Aux. Switches Available: Yes, 32003532-005
  • Shaft Adapter Type: Aluminum Hub, two set screws
  • Spring Return Torque/Force (lb-in., lbf): 100 lb-in
  • Spring Return Torque/Force (Nm, N):11.3 Nm Maximum Stall Torque/Force (lb-in., lbf): 240 lb-in.
  • Maximum Stall Torque/Force (Nm, N): 27 Nm
  • Mounting: Direct Coupled
  • Frequency: 60 Hz
  • Rotational Stroke: 95 ±3 degrees
  • Spring Return Direction: CW
  • Timing, Maximum Spring Return (sec): 25 Sec
  • Timing, Nominal Driving @ 60 Hz (sec): 25 Sec
  • Timing, Maximum Driving @ 60 Hz (sec): 40 Sec
  • Dimensions: 7.5 in high x 5.13 in wide x 3.32 in deep
  • Compatible Damper Shafts (in.): 3/8 to ½ Square or Round
  • Temperature Range, Ambient (F): 0 to 130 F
  • Temperature Range, Storage (F): -40 to 140F
  • Operating Humidity Range: 5 to 95% RH, non-condensing
  • Maximum Noise Rating, Driving (dB(A) @ 1m): 65
  • Maximum Noise Rating, Holding (dB(A) @ 1m): 20 (no audible noise)
  • Environmental Rating: NEMA1
  • Comments: Integral junction box with three 7/8 in. conduit openings (fittings not included)

    **NOTE: Mounting bracket is not included and must be purchased separately (SKU: 205649)

Fast Acting, Spring Return Actuator CW, 230v (HVAC)

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