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Siemens Actuator: Dampers, On/Off, Spring Return, 62 in-lb, 120V AC, Hardwired - Fail-Safe Actuators with Spring Return
SiemensFail-Safe Actuators with Spring Return

Siemens Actuator: Dampers, On/Off, Spring Return, 62 in-lb, 120V AC, Hardwired

The SIEMENS GMA221.1U is a fail-safe actuator with spring return for dampers, featuring a self-centering shaft coupling, 90° stroke, and CW/CCW shaft rotation. It operates on 120V AC input with a 5W power rating and…

SKU 3G-OTH-67542

Brand
Siemens
Item
Actuator: Dampers, On/Off, Spring Return, 62 in-lb, 120V AC, Hardwired
Category
Fail-Safe Actuators with Spring Return
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Technical Specifications

Siemens
Manufacturer Part Number
GMA221.1U
Type
On/Off, Spring Return, 62 in-lb, Hardwired, NEMA 1 / IP54
AC
120V
Shaft Type
Self-Centering Shaft Coupling
Power Rating
5W
Input Voltage
120V AC
Output Signal
0 to 10V DC
Stroke Degree
90°
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

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

Product Description

The SIEMENS GMA221.1U is a fail-safe actuator with spring return for dampers, featuring a self-centering shaft coupling, 90° stroke, and CW/CCW shaft rotation. It operates on 120V AC input with a 5W power rating and provides a 0 to 10V DC output signal. This hardwired actuator is compatible with building automation systems.

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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