The SQM40.181A20 is a Siemens servo motor actuator. It is designed for use in various applications, including damper control, combustion control, and industrial automation.

Here are some key features and specifications of the SQM40.181A20 Siemens servo motor actuator:

1. Model: SQM40.181A20

2. Type: Servo motor actuator

3. Manufacturer: Siemens

4. Operating Voltage: Typically operates on a 24V AC or DC power supply

5. Control Signal: Accepts a control signal of 0-10V or 4-20mA to modulate the actuator position

6. Position Control: Provides precise positioning capability for accurate control of dampers or other mechanical components

7. Feedback Signal: Can include built-in or external feedback devices to provide position feedback to the controlling system

8. Adjustable Stroke: The actuator may allow adjusting the stroke or range of motion to suit specific application requirements

9. Torque: Offers a specific torque output to generate the necessary force for driving and controlling the connected mechanism

10. Compact Design: Typically designed with a compact and robust construction suitable for various installation environments

11. Compatibility: Can be compatible with various control systems and protocols commonly used in industrial automation