Description
Ensure critical safety and building compliance with the Honeywell MS4109F1010, a fast‑acting, spring‑return actuator expertly engineered for fire and smoke damper applications.
Features:
- 30 lb-in. (3.4 Nm) or 80 lb-in. (5.9 Nm) minimum driving torque at 350 F (176 C)
- Reversible mounting facilitates use in either clockwise (cw) or counterclockwise (ccw) spring rotation
- Integral spring return ensures level of return torque
- Fifteen-second spring return timing
- No special cycling required during long-term holding
- No audible noise during holding
- Patent pending design eliminates need for limit switches to reduce power consumption
- Ninety-five degree angle of rotation
- Actuator holds rated torque at reduced power level
- Die-cast aluminum housing
- Housing design allows flush mounting to damper
- Designed to operate reliably in smoke control systems requiring Underwriter’s Laboratories Inc. UL555S ratings up to 350 F.
- SPST position-indicating switches (7 degree, 85 degree stroke).









