LF120 US | Belimo Spring Return Damper Actuator 35 In Lb 120VAC On Off

Belimo · Motors & Motion

Description  The Belimo LF120 US is a spring return damper actuator designed for reliable on/off control of HVAC air dampers using a wide-range AC power supply. Delivering 35 in-lb torque, it supports dependable airflow control with automatic fail-safe positioning during power loss.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Damper Actuators Part Number LF120 US Subcategory Spring Return Damper Actuators Actuator Type Damper Actuator Control Type On/Off Nominal Voltage AC 100…240 V Nominal Frequency 50/60 Hz Voltage Range AC 85…264 V Torque Output 35 in-lb (4 Nm) Spring Return Yes Power Consumption (Operation) 3.5 W Power Consumption (Rest) 2 W Transformer Sizing 6.5 VA Angle of Rotation Max. 95° Running Time 75 s / 90° Electrical Connection 18 GA cable, 1 m, 1/2" NPT Protection Rating IP54, NEMA 2 Ambient Temperature -22…122°F (-30…50°C) Weight 8.3 lb (3.7 kg)   Information About LF120 US The LF120 US is part of Belimo’s spring return damper actuator series engineered for dependable airflow control in commercial HVAC systems. It operates on a universal AC voltage range, allowing direct connection to line-voltage power without the need for external transformers. The actuator incorporates electronic overload protection and double insulation to support safe, maintenance-free operation over its full rotation range. Designed for flexible installation, it supports reversible fail-safe direction and complies with UL and plenum-rated installation requirements. Key Features 35 in-lb Torque Output: Provides consistent mechanical force for reliable operation of small to medium-sized HVAC air dampers. Spring Return Fail-Safe Operation: Automatically drives the damper to a predefined safety position when power is interrupted. Wide AC Voltage Range: Supports direct connection to 100–240 VAC systems, simplifying electrical design and installation. On/Off Control Functionality: Enables straightforward binary damper control for ventilation, exhaust, and zoning applications. Electronic Overload Protection: Protects internal components throughout the full 0–95° rotation range to extend service life. Reversible Mounting Orientation: Allows clockwise or counterclockwise fail-safe action through mounting configuration and selector switch. Plenum-Rated and Certified Design: Complies with UL 2043 and applicable standards for installation in air-handling spaces. The LF120 US delivers the reliability and precision required for safe, long-term spring return damper control in commercial HVAC airflow management applications.

Brand: Belimo · Category: Motors & Motion

Key features

• 35 in-lb Torque Output: Provides consistent mechanical force for reliable operation of small to medium-sized HVAC air dampers.
• Spring Return Fail-Safe Operation: Automatically drives the damper to a predefined safety position when power is interrupted.
• Wide AC Voltage Range: Supports direct connection to 100–240 VAC systems, simplifying electrical design and installation.
• On/Off Control Functionality: Enables straightforward binary damper control for ventilation, exhaust, and zoning applications.
• Electronic Overload Protection: Protects internal components throughout the full 0–95° rotation range to extend service life.
• Reversible Mounting Orientation: Allows clockwise or counterclockwise fail-safe action through mounting configuration and selector switch.
• Plenum-Rated and Certified Design: Complies with UL 2043 and applicable standards for installation in air-handling spaces.

Specifications

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