Honeywell MS4120F1204 120V Fast Acting Spring Return Damper Actuator

The Honeywell MS4120F1204 is a fast-acting, two-position spring return direct coupled actuator designed for on/off control applications in HVAC systems. Operating on 120VAC power, this spring return actuator automatically returns to its failsafe position when power is removed, making it ideal for safety-critical damper control applications.

Key Features:

• 120VAC operation for standard building electrical systems
• Two-position control for simple on/off damper operation
• Spring return design provides failsafe positioning during power loss
• Fast acting response for quick damper positioning
• Direct coupled mounting for secure attachment to damper shafts
• Compact design for easy installation in tight spaces
• Durable construction for reliable long-term operation

This actuator is commonly used in commercial HVAC applications including ventilation dampers, smoke control systems, and air handling equipment where automatic failsafe positioning is required. The spring return mechanism ensures dampers move to a predetermined safe position during power failures or emergency situations.