Belimo FSNF120-FC Actuator

The Belimo FSNF120-FC Actuator is a dedicated 120V fire and smoke damper actuator designed for fail-safe operation in life safety applications. Engineered for two-position control, this motor provides 36 in-lb of torque to reliably drive dampers to the open position, with a heavy-duty spring return mechanism ensuring immediate closure upon power loss or smoke detection. Built to meet UL555S standards, it operates effectively at elevated temperatures up to 350°F, making it a critical component for HVAC fire protection systems. The integrated auxiliary switches allow for precise position monitoring and status feedback to the fire alarm control panel. Its compact footprint and rugged design facilitate straightforward replacement or new installation on multi-blade or round dampers. This NFPA compliant actuator ensures consistent cycle life and high-torque performance under extreme conditions, providing contractors with a reliable solution for maintaining building compartmentation and smoke control integrity.

• Fail-Safe Reliability: Mechanical spring return ensures positive damper closure during power interruptions or alarm states.
• High-Temperature Durability: Tested to withstand the rigorous demands of smoke control sequences.
• Internal Monitoring: Dual auxiliary switches provide real-time feedback on damper blade positioning.
• Simplified Wiring: 120VAC operation eliminates the need for additional step-down transformers in high-voltage circuits.
• Torque Output: Delivers consistent 36 in-lb for various fire smoke damper sizes.

Common Questions

Is the Belimo FSNF120-FC compatible with 24V systems?
No, this model is specifically designed for 120VAC line voltage. For 24V applications, the FSNF24 series must be utilized to prevent component damage.

Can this actuator be used in general ventilation applications?
While technically possible, it is specifically listed and optimized for UL555S fire and smoke applications. Using it for standard cycling may result in unnecessary wear compared to general-purpose actuators.

How do the auxiliary switches function?
The FSNF120-FC features two internal micro-switches that signal when the damper is fully open or fully closed, facilitating integration with building automation and life safety systems.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.