Belimo FSNF120-S Fire Smoke Damper Actuator in-lb Spring Return - 120V 70

The Belimo FSNF120-S is a UL-certified fire and smoke damper actuator designed for life safety applications in commercial HVAC systems. This spring return actuator provides reliable failsafe operation during fire and smoke events, automatically returning dampers to their safe position when power is lost.

Key Specifications:

• Power supply: 120 VAC, 60 Hz
• Torque output: 70 in-lb (8 Nm) for positive damper closure
• Spring return failsafe operation for safety-critical applications
• Rotation range: 95° with adjustable end stops
• Operating time: 15 seconds for full 95° travel
• Temperature rating: Suitable for 350°F (177°C) ambient conditions
• UL listed for fire and smoke damper service

Features:

• Direct-coupled mounting to damper shaft with universal mounting bracket included
• Manual override capability for testing and maintenance
• Position indication for visual verification of damper status
• Compact, low-profile housing for tight installation spaces
• Two-position control (open/close) with spring return to closed position on power loss
• Durable metal gear train for long service life

Ideal for controlling fire dampers, smoke dampers, and combination fire/smoke dampers in air handling systems, stairwell pressurization systems, and other life safety applications where reliable failsafe operation is essential.