FSLF120-S US Belimo Actuator Fire & Smoke
$458.10
Fire & Smoke Actuator, 30 in-lb [3.5 Nm] from 32…350°F [0…177°C], Spring return, AC 120 V, On/Off, 2 x SPST
2 in stock (can be backordered)
FSLF120-S US Belimo Actuator Fire & Smoke Tech Sheet
The Belimo FSLF120-S US Fire & Smoke Actuator is a UL-listed, spring-return actuator designed for reliable operation of fire and smoke dampers in HVAC systems. With 30 in-lb (3.5 Nm) torque, 120V AC power, and integrated auxiliary switches, this actuator ensures dependable fail-safe performance and position feedback for life safety applications.
Apex Controls supplies genuine Belimo fire and smoke actuators with fast U.S. shipping for contractors, OEMs, and facility professionals.
Overview
The FSLF120-S US is engineered specifically for fire and smoke damper applications, where reliable fail-safe operation is critical. It features on/off control and includes two SPST auxiliary switches for position indication and system feedback.
Designed to meet UL555 and UL555S fire/smoke damper requirements, this actuator ensures proper damper operation during emergency conditions.
Key Features
- 30 in-lb (3.5 Nm) torque for fire and smoke dampers
- Spring return (fail-safe) operation
- 120V AC power supply
- On/Off control
- 2 × SPST auxiliary switches for position feedback
- Fast response time (~15 seconds) for motor and spring return
- Direct-coupled mounting (no linkage required)
- Designed for UL-listed fire and smoke damper systems
The auxiliary switches allow integration with building automation systems for damper position monitoring and safety verification.
Applications
The Belimo FSLF120-S US is commonly used in:
- Fire and smoke dampers
- Combination fire/smoke HVAC systems
- Commercial buildings and high-rise structures
- Hospitals and healthcare facilities
- Schools, universities, and public buildings
It is specifically designed for life safety systems, where actuator reliability is critical.
Technical Specifications.
| Specification | Details |
|---|---|
| Angle of Rotation | 95° |
| Direction of Rotation | Reversible with CW/CCW mounting |
| Safety Function | Yes |
| Shaft Diameter | 3/8″–1/2″ round (centers on 1/2″) |
| Actuator Type | Spring return |
| Auxiliary Switches | 2 SPST |
| Application | Fire & Smoke |
| Control Type | On/Off |
| Degree of Protection | IP30; NEMA 1 |
| Electrical Connection | Cable |
| Product Type | Actuator |
| Protection Category | IP30 |
| Running Time | 5–19 seconds |
| Running Time (Fail-safe) | <15 seconds |
| Running Time (Motor) | 15 s at rated voltage and torque (32…122°F / 0…50°C) |
| Torque | 30 in-lb (3.5 Nm) from 32…350°F (0…177°C) |
| Voltage (AC/DC) | 120 V |
| Weight | 7 lbs |
|---|---|
| Dimensions | 5 × 9 × 4 in |
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