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Siemens SQN72.4A4A20 Actuator - 90 Degree Rotation

Siemens SQN72.4A4A20 Actuator for combustion control.

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ManufacturerSiemens

Part numberSQN72.4A4A20

Voltage 120V AC

Frequency 50/60 Hz

Torque 7.5 Nm

Rotation Angle 90°

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Electromechanical Actuator 120V AC Operation 7.5 Nm Torque 90° Rotation Combustion Control IP40 Protection

Product description

The Siemens SQN72.4A4A20 is a robust electromechanical actuator engineered for precise positioning of air dampers and gas valves in combustion systems. It operates on a 120V AC supply (50/60 Hz) and delivers a substantial 7.5 Nm of torque for a 90° rotation, ensuring reliable control of airflow and fuel. The actuator is designed for durable performance in industrial and commercial heating applications.

This actuator is integral to maintaining optimal combustion efficiency and safety in boilers, furnaces, and other thermal processing equipment. It is commonly employed in systems requiring automated adjustment of dampers for air intake or gas valves for fuel delivery, facilitating precise process control.

Stanlo Automation, your trusted veteran-owned source for surplus industrial automation parts, provides the Siemens SQN72.4A4A20. We help you secure critical components at competitive prices, minimizing downtime and maximizing operational efficiency.

Technical specifications

Voltage	120V AC
Frequency	50/60 Hz
Torque	7.5 Nm
Rotation Angle	90°
Type	Electromechanical Actuator
Protection	IP40

Common applications

Boiler Control

Furnace Control

Air Damper Actuation

Gas Valve Control

Industrial Heating

Combustion Systems

Compatible systems

Siemens Burner Control Units LMV series controllers

Also known as

Siemens Boiler Actuator SQN72 Series Actuator 120V AC Damper Actuator Siemens Combustion Actuator

Replaces / compatible with

Suitable for direct replacement of Siemens SQN72 series actuators in similar boiler and combustion control applications. Always verify electrical and mechanical compatibility.

Technical note

Expert tip

Ensure the control signal for this actuator is correctly sequenced with the burner management system to prevent improper operation.

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Frequently asked questions

What are the key specifications for the Siemens SQN72.4A4A20 actuator?

The Siemens SQN72.4A4A20 actuator operates on 120V AC (50/60 Hz), provides 7.5 Nm of torque, and offers a 90° rotation angle. Its IP40 rating ensures protection against solid objects.