Overview
The Belimo FSTF24-S US is a compact spring return fire and smoke damper actuator featuring auxiliary position switches. It delivers 18 in-lb of torque for reliable close-off in small damper assemblies.
Features
- Fail-safe mechanical spring return operation on power loss
- Two built-in SPST auxiliary switches for remote status signaling
- Compact footprint for space-constrained duct applications
- Reversible direction of rotation by CW/CCW mounting
- UL555 and UL555S listed for fire and smoke safety
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
- Fire and smoke damper operation in 24V commercial ductwork
- Life-safety air management with auxiliary position feedback



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