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Siemens GCA121.1P electric actuator thermostat, compact boxy form, matte grey finish

SIEMENS

SIEMENS GCA121.1P Electric Actuator Thermostat 160 in-lb 24V

SKU CH-H7E2-EV87X

An electric damper actuator delivering 160 in-lb torque at 24 V AC/DC with spring return in 15 seconds

  • Product typeLearning Thermostats
  • Precise 90-degree stroke for accurate damper positioning
  • Spring-return safety closes the valve in 15 seconds
  • Self-centering shaft coupling simplifies direct mounting
  • IP54 and NEMA 2 ratings protect against dust and splashes
  • 24 V AC/DC supply compatible with building automation systems

Electric Actuator for Building Automation

The SIEMENS GCA121.1P electric actuator delivers 160 in-lb of rated torque for damper control in building automation systems. It operates on 24V AC/DC input voltage and provides a 0 to 10V DC output signal. The unit features a spring-return mechanism with a 15-second close time and a 90-degree stroke.

Direct Mount with Self-Centering Shaft

Installation uses a direct-mount design with a self-centering shaft coupling that simplifies alignment on the damper shaft. The actuator supports both clockwise and counterclockwise rotation. Electrical connections are hardwired, and the NEMA 2 enclosure with IP54 rating protects internal components in indoor environments.

Verify Voltage Signal and Shaft Compatibility

Confirm your system supplies 24V AC/DC power and accepts a 0 to 10V DC control signal before ordering. Ensure the damper shaft dimensions suit the self-centering coupling and that the 90-degree stroke matches the required travel. The spring-return action requires power to hold the open position.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $228.99
Pricier than about 87% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameSIEMENS
Product typeLearning Thermostats

Questions about this item

How can I confirm the actuator is operating correctly after installation?

Verify the shaft rotates 90 degrees in both clockwise and counter-clockwise directions, the spring return closes the damper within 15 seconds, and the output signal reads 0 to 10V DC at the controller.

What components are included with the GCA121.1P and what must be sourced separately?

The actuator ships with a self-centering shaft coupling for direct mounting; 24V AC/DC power wiring and integration into the building automation system must be provided separately.

Which torque and voltage version should I select for a 160 in-lb damper on a 24V circuit?

Choose this GCA121.1P model rated for 160 in-lb torque and 24V AC/DC input; it is the only version matching those exact specifications.

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