Overview
The Siemens SQM41.241A11SC is a high-precision electromotoric actuator designed for the modulating control of gas, oil, and combustion air flow. Engineered for medium to high-capacity burners and thermal process plants, this self-reversing actuator provides reliable rotary motion to drive butterfly valves, dampers, and oil pressure controllers. Its robust design ensures accurate positioning and long-term durability in demanding industrial and commercial HVAC environments.
Features
- Electromotoric drive providing precise load-dependent control
- Integrated electronic version with support for analog control signals
- Internal position indication for accurate monitoring
- Drive shaft can be manually disengaged for quick alignment and reengaged automatically
- Robust construction with a die-cast aluminum lower housing and impact-resistant plastic cover
- Clockwise rotation variant with high torque output
- Maintenance-free gear train with adjustable cams for switching point settings
Specifications
- Model: SQM41.241A11SC
- Operating Voltage: AC 110 V (50/60 Hz)
- Torque: 90 in-lb (approximately 10 Nm)
- Running Time: 30 seconds for 90 degree rotation
- Control Signals: 4-20 mA, 0-135 Ohm, or 2-10 VDC
- Rotation Direction: Clockwise (CW)
- Shaft Type: 10mm keyed shaft
- Enclosure Rating: NEMA 4 / IP66 (weatherproof)
- Approvals: CE, UL, and CSA listed
Applications
- Load-dependent control of combustion air, gas, and oil flow in industrial burners
- Positioning of flow control valves and butterfly valves in thermal process plants
- Modulating control for HVAC systems requiring high turndown ratios
- Use in connection with 3-position or modulating controllers and burner controls like the LME7 series



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