Schneider Electric MD20SR-TS Spring Return Damper Actuator
Schneider Electric MD20SR-TS is a 20 Nm fail-safe HVAC damper actuator with mechanical spring return, 2-position / 3-wire floating control, 24–240 VAC / 24–125 VDC supply and IP54 protection.
Schneider Electric MD20SR-TS provides fail-safe airflow control with two integrated SPDT auxiliary switches in ventilation and air-conditioning systems. The motor drives the damper during normal operation, while the mechanical spring moves it to the selected safety position after power loss. Its 20 Nm torque is intended for dampers of approximately 4 m², subject to damper construction and installation conditions.
Key features
Mechanical fail-safe spring return
20 Nm motor and spring-return torque
2-position / 3-wire floating control
24–240 VAC / 24–125 VDC power supply
IP54 enclosure protection
Universal mounting for spring-return direction
Two integrated SPDT auxiliary switches
Technical specifications
Commercial Reference: MD20SR-TS
Actuator Type: Electric rotary spring return
Motor Torque: 20 Nm
Spring Return Torque: 20 Nm
Recommended Damper Area: approximately 4 m²
Control Signal: 2-position / 3-wire floating
Power Supply: 24–240 VAC / 24–125 VDC
Auxiliary Switches: 2 x SPDT integrated
Spring Return Time: 20 seconds or less
Rotation: Maximum 95°, adjustable mechanical end stop
Protection Rating: IP54
Connection: 1 m cable
Applications
Air-handling units
Smoke-control and safety-position dampers where project design permits
Ventilation shut-off dampers
Commercial HVAC systems
BMS-controlled airflow
Verified compatibility
HVAC dampers with a compatible shaft and torque requirement
BMS controllers with the specified output signal and supply voltage
Review the official Schneider Electric source linked on this page and confirm the final controller, power, network and project requirements before ordering.
