Siemens Building Technology GQD126.1P Actuator

The Siemens GQD126.1P is a heavy-duty OpenAir electronic damper actuator designed for professional HVAC installations requiring fail-safe reliability. Built as a direct-coupled spring return actuator, this unit delivers 20 lb-in torque (2 Nm), making it the standard choice for managing economizer units, small HVAC control dampers, and residential zone systems. Operating on a 24 VAC/DC power supply, it utilizes a 2-position control (On/Off) signal to provide precise mechanical positioning. High-performance engineering ensures a fast 30-second runtime for motor drive and a 15-second spring return for emergency shutdown or power loss scenarios.

This plenum-rated actuator features a compact footprint for tight mechanical spaces and comes equipped with dual auxiliary switches factory-set at 5° and 85° for position signaling. The rugged, NEMA 1 housing is designed to withstand demanding environments, maintaining efficiency in VAV systems and air handling units. Technical pros value the GQD126.1P for its pre-cabled 3-foot lead and integrated mounting bracket, which simplify field installation and ensure compatibility with standard 3/8" to 1/2" round or 1/4" to 7/16" square shafts.

• Fail-Safe Spring Return: Mechanical 15-second return ensures dampers move to the safe position during power interruptions.
• Dual Auxiliary Switches: Integrated fixed-point switches provide reliable remote feedback for open/closed confirmation.
• Plenum Rated (UL Standard): Durable 18 AWG plenum cable allows for safe installation in ceiling spaces and air returns.
• High Torque/Small Footprint: Delivers 20 lb-in torque while fitting easily into compact economizer and zone damper assemblies.
• Universal Compatibility: Low-voltage 24V AC/DC operation works with most commercial and residential building automation systems.

What is the difference between the GQD126.1P and GQD121.1P?
The GQD126.1P includes dual auxiliary switches for end-position feedback, whereas the GQD121.1P is a basic model without those integrated switches. Both share the same 20 lb-in torque and spring return specifications.

Can this actuator be used for fire and smoke applications?
While the GQD series is plenum rated and ideal for control dampers and economizers, specifically listed fire/smoke dampers typically require actuators with UL555S certification. Always verify local codes for smoke control requirements.

Is the shaft rotation reversible?
Yes, the GQD126.1P is bi-directional. Rotation direction (clockwise or counter-clockwise) is determined by how the actuator is mounted on the damper shaft.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.