The Siemens SQM40.261A21 is an actuator designed for various industrial applications. It is a part of the SQM40 series of actuators offered by Siemens, known for their reliable performance and precise control.

Here are some key features and specifications of the Siemens SQM40.261A21 actuator:

1. Actuator Type: The SQM40.261A21 is an electric actuator that operates using electrical signals to control its movement and positioning.

2. Control Signal: It accepts a proportional control signal, such as a 0-10V DC or 4-20mA input, to regulate its operation and positioning.

3. Torque Output: The actuator is capable of delivering a specific torque output, which is typically specified in the product documentation. The SQM40 series actuators have various torque ratings to suit different application requirements.

4. Feedback: The SQM40.261A21 actuator may feature built-in feedback mechanisms to provide position feedback or other relevant data for closed-loop control and monitoring.

5. Communication: The actuator may support communication protocols or interfaces that enable integration with control systems or networks for remote monitoring and control.

6. Construction: The Siemens SQM40.261A21 actuator is designed with robust construction, suitable for demanding industrial environments. It is built to withstand mechanical stress, provide long service life, and maintain precise control.