Schneider Electric (Barber Colman) MA-305 2-Position S/R Damper Actuator 24V

The Schneider Electric MA-305 is a 24-volt, two-position, spring-return damper actuator for HVAC systems.It is an electromechanical device that adjusts the location of air dampers to control airflow in the system.The MA-305 detects 24-volt electrical signals from a thermostat or control system. This signal tells the actuator to move its internal shaft, which is attached to a lever arm. The lever arm, in turn, opens or shuts the damper blade, sending airflow through the appropriate ductwork. The "spring-return" feature ensures that the damper returns to a predetermined position when no electrical signal is present.This actuator is commonly used in air-handling units, fan coil units, and variable air volume systems.