We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
⌕
RFQ CartGet a QuoteSign inSign up
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

Brand
Siemens
Item
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired
Category
Fail-Safe Actuators with Spring Return
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA126.1U). Key specifications — Manufacturer Part Number: GCA126.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA126.1U). Key specifications — Manufacturer Part Number: GCA126.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA166.1U). Key specifications — Manufacturer Part Number: GCA166.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA166.1U). Key specifications — Manufacturer Part Number: GCA166.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Siemens
Actuator: Dampers, On/Off, Spring Return, 62 in-lb, 24V AC/DC, Hardwired, NEMA 1 / IP54 (MPN GMA121.1U). Key specifications — Manufacturer Part Number: GMA121.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 3.5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, Proportional, Spring Return, 62 in-lb, 24V AC/DC, Hardwired, NEMA 1 / IP54 (MPN GMA161.1U). Key specifications — Manufacturer Part Number: GMA161.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 3.5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, Proportional, Spring Return, 62 in-lb, 24V AC/DC, Hardwired, NEMA 1 / IP54 (MPN GMA161.1U). Key specifications — Manufacturer Part Number: GMA161.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 3.5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired Plenum Rated Cables (MPN GCA121.1P). Key specifications — Manufacturer Part Number: GCA121.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired Plenum Rated Cables (MPN GCA121.1P). Key specifications — Manufacturer Part Number: GCA121.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired Plenum Rated Cables (MPN GCA126.1P). Key specifications — Manufacturer Part Number: GCA126.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS.
Siemens
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 24V AC/DC, Hardwired Plenum Rated Cables (MPN GCA126.1P). Key specifications — Manufacturer Part Number: GCA126.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS.

More from Siemens

View all Siemens parts →
Siemens
Siemens
Actuator: Dampers, Proportional, Spring Return, 62 in-lb, 24V AC/DC, Hardwired, NEMA 1 / IP54 (MPN GMA166.1U). Key specifications — Manufacturer Part Number: GMA166.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 3.5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC, Hardwired Plenum Rated Cables (MPN GCA161.1P). Key specifications — Manufacturer Part Number: GCA161.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC; Brand: SIEMENS.
Siemens
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC, Hardwired Plenum Rated Cables (MPN GCA161.1P). Key specifications — Manufacturer Part Number: GCA161.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC; Brand: SIEMENS.
Actuator: Dampers, Floating Point, Spring Return, 62 in-lb, 19.2 to 28.8V AC/DC, NEMA 1 / IP54 (MPN GMA131.1P). Key specifications — Manufacturer Part Number: GMA131.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Power Rating: 3.5W; Input Voltage: 19.2 to 28.8V AC/DC; Brand: SIEMENS.
Siemens
Actuator: Dampers, Floating Point, Spring Return, 62 in-lb, 19.2 to 28.8V AC/DC, NEMA 1 / IP54 (MPN GMA131.1P). Key specifications — Manufacturer Part Number: GMA131.1P; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Plenum Rating: Plenum Rated; Power Rating: 3.5W; Input Voltage: 19.2 to 28.8V AC/DC; Brand: SIEMENS.
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 120V AC, Hardwired, NEMA 2 / IP54 (MPN GCA221.1U). Key specifications — Manufacturer Part Number: GCA221.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Input Voltage: 120V AC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible; Output Signal: 0 to 10V DC.
Siemens
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 120V AC, Hardwired, NEMA 2 / IP54 (MPN GCA221.1U). Key specifications — Manufacturer Part Number: GCA221.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Input Voltage: 120V AC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible; Output Signal: 0 to 10V DC.
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 7 to 28.8V AC/DC, Hardwired (MPN GCA163.1U). Key specifications — Manufacturer Part Number: GCA163.1U; Shaft Type: Self-Centering; Shaft Rotation: CW/CCW; Stroke Degree: 0 to 90°; Power Rating: 5 W; Input Voltage: 7 to 28.8V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 7 to 28.8V AC/DC, Hardwired (MPN GCA163.1U). Key specifications — Manufacturer Part Number: GCA163.1U; Shaft Type: Self-Centering; Shaft Rotation: CW/CCW; Stroke Degree: 0 to 90°; Power Rating: 5 W; Input Voltage: 7 to 28.8V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 120V AC, Hardwired, NEMA 2 / IP54 (MPN GCA226.1U). Key specifications — Manufacturer Part Number: GCA226.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Input Voltage: 120V AC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible; Output Signal: 0 to 10V DC.
Siemens
Actuator: Dampers, On/Off, Spring Return, 160 in-lb, 120V AC, Hardwired, NEMA 2 / IP54 (MPN GCA226.1U). Key specifications — Manufacturer Part Number: GCA226.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Input Voltage: 120V AC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible; Output Signal: 0 to 10V DC.
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA151.1U). Key specifications — Manufacturer Part Number: GCA151.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA151.1U). Key specifications — Manufacturer Part Number: GCA151.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Plenum Rating: Not Plenum Rated; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA161.1U). Key specifications — Manufacturer Part Number: GCA161.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
Siemens
Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA161.1U). Key specifications — Manufacturer Part Number: GCA161.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.