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Siemens Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired - Fail-Safe Actuators with Spring Return
SiemensFail-Safe Actuators with Spring Return

Siemens Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired

The Siemens GCA121.1U 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 input with a 5W power rating and provides a 0 to 10V DC…

SKU 3G-OTH-67696

Also listed as: GCA1211U · GCA121 1U · GCA121-1U

Brand
Siemens
Item
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired
Category
Fail-Safe Actuators with Spring Return
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Siemens
Manufacturer Part Number
GCA121.1U
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
No
Electrical Connection Type
Hardwired
For Use With Building Automation Systems
Building Automation System Compatible

Technical Documents

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

Product Description

The Siemens GCA121.1U 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 input with a 5W power rating and provides a 0 to 10V DC output signal. This hardwired actuator is building automation system compatible and has a NEMA 2 / IP54 enclosure rating.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Siemens GCA121.1U damper actuator used for?

The Siemens GCA121.1U is a fail-safe damper actuator with spring return, designed for building automation systems. It controls HVAC dampers in commercial or industrial environments, providing on/off operation with 160 in-lb torque at 24V AC/DC. Its self-centering shaft coupling and CW/CCW rotation simplify installation on various damper shafts.

What are the specifications of the Siemens GCA121.1U actuator?

The Siemens GCA121.1U is an on/off, spring return damper actuator with 160 in-lb torque. It operates on 24V AC/DC input, consumes 5W, and provides a 0 to 10V DC output signal. It features a self-centering shaft coupling, CW/CCW rotation, hardwired connection, and a NEMA 2 / IP54 enclosure. It is not plenum rated.

Where to buy the Siemens GCA121.1U actuator worldwide?

3G Electric supplies the Siemens GCA121.1U damper actuator to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this fail-safe spring return actuator for building automation systems.

How to install the Siemens GCA121.1U spring return actuator?

Install the Siemens GCA121.1U by mounting it on the damper shaft using the self-centering coupling, ensuring CW/CCW rotation matches damper direction. Wire the 24V AC/DC input and 0 to 10V DC output per the wiring diagram. Verify spring return action for fail-safe operation. Always follow local codes and the manufacturer's manual.

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

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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