The Schneider Electric (Barber Colman) MA40-7040 DuraDrive is a two-position, spring-return damper actuator engineered for reliable on/off control in commercial HVAC and building automation applications. Its robust design and universal shaft clamp make installation straightforward across a wide range of damper shaft configurations.
Key Features
- Two-position (open/close) control for simple, dependable damper operation
- Spring-return failsafe mechanism ensures the damper returns to its default position on power loss
- Universal clamp accommodates round shafts up to 5/8″ diameter or square shafts up to 1/2″
- Compact, durable DuraDrive housing built for long service life in commercial environments
Electrical Specifications
- Supply Voltage: 120V AC
- Power Consumption (Running): 3.4 Watts
- Power Consumption (Holding): 1.2 Watts
- Apparent Power: 4.3 VA
Mechanical Specifications
- Torque Output: 35 Lb-In
- Shaft Compatibility: Round shafts up to 5/8″ diameter; square shafts up to 1/2″
- Return Type: Spring return (failsafe)
Applications
- Commercial HVAC damper control
- Building automation systems
- Air handling unit (AHU) damper actuation
- Ventilation and economizer damper control
The MA40-7040 is a proven choice for contractors and building automation professionals seeking a dependable, easy-to-install spring-return actuator with a universal shaft clamp. Its low holding wattage reduces energy consumption during steady-state operation, while the 35 lb-in torque rating handles typical commercial damper loads with ease.
