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Siemens GCA126.1U Fail-Safe Spring Return Damper Actuator - Fail-Safe Actuators with Spring Return
SiemensFail-Safe Actuators with Spring Return

Siemens GCA126.1U Fail-Safe Spring Return Damper Actuator

The Siemens GCA126.1U is a fail-safe damper actuator with spring return, featuring a self-centering shaft coupling and CW/CCW rotation. It operates on 24V AC/DC with a 5W power rating, provides a 0 to 10V DC output…

SKU 3G-OTH-68126

Also listed as: GCA1261U · GCA126 1U · GCA126-1U

Brand
Siemens
Item
GCA126.1U Fail-Safe Spring Return Damper Actuator
Part Number
GCA126.1U
Category
Fail-Safe Actuators with Spring Return
Available to Order
Also known as:GCA126.1USiemens
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Technical Specifications

Siemens
Manufacturer Part Number
GCA126.1U
Type
On/Off, Spring Return, 160 in-lb, Hardwired, NEMA 2 / IP54
AC/DC
24V
Shaft Type
Self-Centering Shaft Coupling
Power Rating
5W
Input Voltage
24V AC/DC
Output Signal
0 to 10V DC
Plenum Rating
Not Plenum Rated
Shaft Rotation
CW/CCW
Auxiliary Switch Included
Yes
Electrical Connection Type
Hardwired
For Use With Building Automation Systems
Building Automation System Compatible

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens GCA126.1U is a fail-safe damper actuator with spring return, featuring a self-centering shaft coupling and CW/CCW rotation. It operates on 24V AC/DC with a 5W power rating, provides a 0 to 10V DC output signal, and includes an auxiliary switch. This hardwired actuator is building automation system compatible and has a NEMA 2 / IP54 rating.

Frequently Asked Questions

What is the Siemens GCA126.1U damper actuator used for?

The Siemens GCA126.1U is a fail-safe spring return actuator used to control dampers in HVAC building automation systems. It provides 160 in-lb torque for on/off damper positioning, with a self-centering shaft coupling and CW/CCW rotation, ensuring reliable operation in commercial and industrial ventilation applications.

What are the specifications of the Siemens GCA126.1U actuator?

The Siemens GCA126.1U operates on 24V AC/DC with a 5W power rating, delivers 160 in-lb torque, and includes a 0 to 10V DC output signal and an auxiliary switch. It features a self-centering shaft coupling, CW/CCW rotation, hardwired connection, and a NEMA 2 / IP54 enclosure rating. It is not plenum rated.

Where to buy the Siemens GCA126.1U actuator worldwide?

You can source the Siemens GCA126.1U damper actuator through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens components for building automation systems.

How to install the Siemens GCA126.1U spring return actuator?

Mount the Siemens GCA126.1U directly onto the damper shaft using its self-centering coupling, ensuring CW/CCW rotation matches damper direction. Connect 24V AC/DC power and control wiring per the hardwired terminal diagram. Verify the auxiliary switch and 0 to 10V DC output signal function before commissioning. Follow Siemens installation guidelines for proper fail-safe operation.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks
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Siemens Products

3G Electric supplies Siemens fail-safe actuators with spring return. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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