Belimo EFB120-S N4 Actuator

The Belimo EFB120-S N4 is a heavy-duty spring return actuator designed for on/off control in demanding HVAC and industrial environments. This unit delivers 270 in-lb of torque, providing reliable fail-safe operation for large dampers and valve assemblies during power loss. Integrated with a NEMA 4 (IP66) enclosure, it is engineered to withstand harsh outdoor conditions, preventing moisture ingress and corrosion. Operating on a 120V AC power supply, it includes two auxiliary switches for position signaling and sequence interfacing. Its brushless DC motor technology ensures precise timing and consistent torque output across its full rotation, reducing maintenance intervals compared to brushed alternatives. The EFB120-S N4 is a direct-coupled solution that simplifies installation on standard shafts, making it a preferred choice for contractors managing smoke and fire damper systems or high-pressure air handlers requiring high-torque automation.

• 270 in-lb Torque: High-capacity output suitable for large-scale dampers and high-static air systems.
• NEMA 4 Enclosure: Rugged, weather-tight protection allows for reliable outdoor HVAC actuator installation.
• Integrated Auxiliary Switches: Two built-in SPDT switches provide easy feedback for system status or safety interlocks.
• Spring Return Fail-Safe: Mechanical spring return ensures the system reverts to a safe position during power interruptions.
• Universal Compatibility: Designed for easy mounting on round or square shafts with standard hardware.

What is the runtime for the Belimo EFB120-S N4?
This 120V spring return actuator typically features a motor runtime of less than 75 seconds and a spring return time of less than 20 seconds, ensuring rapid response in fail-safe scenarios.

Can the EFB120-S N4 be used in wash-down environments?
Yes, the NEMA 4 / IP66 rated housing is designed to protect internal components from water spray, dust, and debris, making it ideal for food processing or industrial sites.

Does this unit support manual override?
The EFB series includes a manual crank that allows technicians to position the damper or valve manually during commissioning or power outages.

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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.