The Siemens STA121.65L10 is an electrothermal actuator designed for controlling Siemens radiator, small, zone, and combi valves in HVAC systems. Operating at AC/DC 24 V, this actuator provides 2-position control (on/off) with a positioning force of 125 N and a stroke of 6.5 mm. It is ideal for precise control in water-based heating and cooling systems. The actuator offers maintenance-free operation and is equipped with a visible 360° position indicator for easy monitoring. The STA121.65L10 also supports direct mounting with an M30 x 1.5 mm threaded connection.

Key Features:

• Operating voltage: AC/DC 24 V
• Positioning force: 125 N
• Stroke: 6.5 mm
• Direct assembly using M30 x 1.5 mm threaded connection
• Maintenance-free and quiet operation
• Compatible with Siemens valves (radiator, small, zone, and combi valves)

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