Overview
The Belimo FSTF24-S.1 US is a compact 24V spring return fire and smoke damper actuator with built-in auxiliary switches. It is designed for smaller life-safety dampers in commercial ventilation ductwork.
Features
- Spring return fail-safe action returns damper to safe state on power loss
- Two built-in SPST auxiliary switches for end-position indication
- Low-profile design suited for compact installation spaces
- Reversible rotation via CW or CCW mounting
- Tested per UL555 and UL555S safety standards
Specifications
- Actuator Type: Spring return
- Torque: 18 in-lb [2 Nm]
- Voltage: AC/DC 24 V
- Control Type: On/Off
- Auxiliary Switches: 2 x SPST
- Angle of Rotation: 95°
- Degree of Protection: IP42, NEMA 2, UL Enclosure Type 2
Applications
- Control of small fire and smoke dampers in 24V HVAC systems
- Life-safety damper positioning requiring status indication



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