Actuators and Dampers

MS4xxx, MS81xx Series

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Product Bar End

MS4xxx, MS81xx Series

Fire and Smoke Damper Actuators MS4xxx, MS81xx Series

Fire and Smoke Damper Actuators


Honeywell fire and smoke damper actuators are designed to meet both UL-555 and UL-555S 350°F safety requirements for combined fire and smoke applications. The fast-acting actuators close dampers in 15-20 seconds, and the integral spring return ensures the consistent, proper level of torque.


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QtyModelDescriptionIn StockList PriceInternet Price
32003532-005 AUX. SW. 2-SPDT, FOR MLXX15, MLXX09 INFO135.00108.00
MS4104F1010 FIRE/SMK ACT/30 IN-LB/120VAC/SR In Stock467.00373.60
MS4104F1210 FIRE/SMK ACT/30 IN-LB/120VAC/SR/2 SWITCHES In Stock548.00438.40
MS4109F1010 FIRE/SMK ACT/80 IN-LB/120V/SR In Stock615.00492.00
MS4109F1210 FIRE/SMK ACT/80 IN-LB/120V/SR/2 SWITCHES INFO695.00556.00
MS4120F1006 FIRE/SMK ACT/175 IN-LB/120V In Stock784.00627.20
MS4120F1204 FIRE/SMK ACT., 175 IN-LB, 120V, 2 AUX. SW. In Stock865.00692.00
MS4604F1010 FIRE/SMK ACT/30 IN-LB/230VAC/SR INFO497.00397.60
MS4604F1210 FIRE/SMK ACT/30 IN-LB/230VAC/SR/2 SWITCHES INFO578.00462.40
MS4609F1010 FIRE/SMK ACT/80 IN-LB/230V/SR INFO725.00580.00
MS4609F1210 FIRE/SMK ACT/80 IN-LB/230V/SR/2 SWITCHES INFO806.00644.80
MS4620F1005 FIRE/SMK ACT., 175 IN-LB, 230V INFO879.00703.20
MS4620F1203 FIRE/SMK ACT., 175 IN-LB, 230V, 2 AUX. SW. INFO972.00777.60
MS8104F1010 FIRE/SMK ACT/30 IN-LB/24V/SR INFO437.00349.60
MS8104F1210 FIRE/SMK ACT/30 IN-LB/24V/SR/2 SWITCHES INFO518.00414.40
MS8109F1010 FIRE/SMK ACT/80 IN-LB/24V/SR INFO564.00451.20
MS8109F1210 FIRE/SMK ACT/80 IN-LB/24V/SR/2 SWITCHES INFO645.00516.00
MS8120F1002 FIRE/SMK ACT., 175 IN-LB, 24V In Stock720.00576.00
MS8120F1200 FIRE/SMK ACT., 175 IN-LB, 24V, 2 AUX. SW. In Stock812.00649.60


No accessories found
  • Designed to meet UL-555 and UL-555S requirements
  • Robust die-cast aluminum housing for protection and long service life
  • Maximum spring return timing of 15-20 seconds
  • Reliably built by the industry leader
  • Energy-saving patented design
  • No audible noise during holding

Motor:DC with brushes


 :MS4xxx 32" leads, 18 AWG and 7/8" knockout holes for conduit fittings

 :MS8xxx 39" leads, 18 AWG and 7/8" knockout holes for conduit fittings

Action:CW/CCW mounting method

Rotation:95° ±3°, mechanically limited

Auxilliary Switch:

 :-F120X 2 SPST, 5A res., 3A ind. @ 250VAC

 :-F10XX None


 :Driving Open 80 dBA @ 3' (1.0 m)

 :Holding 20 dBA @ 3' (1.0 m) no audible noise

Life Expectancy:30,000 cycles

Operating Temperature:0° to 130℉ (-18° to 55℃)

Operating Humidity:5 to 95% RH, non-condensing

Approvals:CE, C-TICK, cULus,UL873, NEMA1

Warranty:5 years