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SiemensFail-Safe Actuators with Spring Return

Siemens Actuator: Dampers, Proportional, Spring Return, 62 in-lb, 24V AC/DC, Hardwired

The Siemens GMA166.1U is a proportional, spring-return fail-safe damper actuator with a self-centering shaft coupling, rated at 62 in-lb and 3.5W. It operates on 24V AC/DC input, provides a 0 to 10V DC output signal…

SKU 3G-OTH-67603

Also listed as: GMA1661U · GMA166 1U · GMA166-1U

Brand
Siemens
Item
Actuator: Dampers, Proportional, Spring Return, 62 in-lb, 24V AC/DC, Hardwired
Category
Fail-Safe Actuators with Spring Return
Available to Order
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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
GMA166.1U
Type
Proportional, Spring Return, 62 in-lb, Hardwired, NEMA 1 / IP54
AC/DC
24V
Shaft Type
Self-Centering Shaft Coupling
Power Rating
3.5W
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

Technical Documents

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

Product Description

The Siemens GMA166.1U is a proportional, spring-return fail-safe damper actuator with a self-centering shaft coupling, rated at 62 in-lb and 3.5W. It operates on 24V AC/DC input, provides a 0 to 10V DC output signal, and supports CW/CCW shaft rotation. This hardwired actuator includes an auxiliary switch, is NEMA 1 / IP54 rated, and is compatible with building automation systems.

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 GMA166.1U actuator used for?

The Siemens GMA166.1U is a proportional, spring-return fail-safe damper actuator used in building automation systems to control HVAC dampers. It provides 62 in-lb torque, operates on 24V AC/DC, and includes a self-centering shaft coupling for reliable positioning in commercial air-handling applications.

What are the specifications of the Siemens GMA166.1U?

The Siemens GMA166.1U is a proportional spring-return actuator rated at 62 in-lb and 3.5W. It accepts 24V AC/DC input, outputs a 0 to 10V DC signal, and features a self-centering shaft coupling with CW/CCW rotation. It is hardwired, NEMA 1 / IP54 rated, and includes an auxiliary switch.

Where to buy the Siemens GMA166.1U worldwide?

3G Electric supplies the Siemens GMA166.1U damper actuator worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this actuator to any international destination.

How to install the Siemens GMA166.1U actuator?

Mount the Siemens GMA166.1U directly onto the damper shaft using its self-centering coupling. Ensure 24V AC/DC power is disconnected during wiring. Connect control signal wires per the hardwired terminal diagram. After installation, verify spring-return operation and auxiliary switch function before commissioning the building automation system.

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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