Siemens STA63 Electrothermal Actuator


Siemens STA63 Electrothermal Actuator covers the widest range of equipment combinations and applications. The cable is a standard length is included with actuators using connecting cables. Actuators without connecting cables can be used in combination with the appropriate cables, see Accessories / Connecting cables

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Country : Germany

Product Description

Siemens STA63 Electrothermal Actuator stem retracts and the radiator valve is opened by the spring. The
position of the stem is proportional to the DC 0…10 V positioning signal. The actuator stem extends when de-energized and the radiator valve is closed. The actuator deploys to the 50% stroke position if the positioning signal is lost when applying operating voltage.DC 0…10 V actuators support various operation modes, see also under DIPSwitch settings.

Features of  Siemens STA63 Electrothermal Actuator :

  • Connecting cable up to 15 m, halogen-free up to 10 m
  • Connecting cable with LED operation indicator
  • Connecting cable with DC 0…10 V module or auxiliary switch.


Additional Information

Weight 1 kg
Model No
Item Number S55174-A104
Positioning Signal DC 0…10 V
Positioning Time 270 s
Stroke 4.5 mm
Degree of Protection IP54
Permissible temperature of medium in the connected valve 1 to 110 °C
Operating Temperature
Operating Humidity
Operating Voltage
Operating Voltage Frequency AC 24 V ± 20 % 50 / 60 Hz
Cable Length
Power Consumption


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