Description
The Siemens GMA126.1U is a 2-position, spring return damper actuator engineered for dependable performance in commercial and light-industrial HVAC building automation applications. Designed to operate on a 24V control signal, this actuator delivers 62 lb-in of torque — providing the muscle needed to drive damper blades reliably in air handling, ventilation, and economizer systems. The integrated auxiliary switch enables end-of-travel feedback or interlocking with other system components, making it a versatile choice for both new construction and retrofit projects.
Key Features
- 2-position (open/close) control for straightforward on/off damper operation
- Spring return fail-safe action — damper returns to a defined position on power loss
- 24V AC/DC supply voltage for compatibility with standard building automation controls
- 62 lb-in output torque for positive damper actuation
- Integrated auxiliary switch for end-of-travel signaling or system interlocking
- Compact, robust housing suitable for commercial HVAC environments
- Direct-coupled mounting — no crank arm or linkage required
Typical Applications
- Air handling unit (AHU) damper control
- Economizer and outside air dampers
- Exhaust and return air dampers
- Building automation and DDC system integration
- Commercial HVAC zoning and ventilation control
Product Specifications
- Brand: Siemens Building Technology
- Model / SKU: GMA126.1U
- Control Type: 2-Position (Spring Return)
- Supply Voltage: 24V
- Output Torque: 62 lb-in
- Auxiliary Switch: Included
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