Open/Close Damper Actuator, 20Nm, 230 V ac

  • RS Stock No. 712-2668
  • Mfr. Part No. SF230A-S2
  • Manufacturer Belimo
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): CH
Product Details

SF Series Spring Return with Emergency Function

New SF Series spring return actuators with emergency function for adjusting air dampers in ventilation and air conditioning systems in buildings. These replace the current AF series.,The motor moves the damper to its normal operating position against spring tension with a powerful turning and holding torque of 20 Nm. The spring will then return the damper to its safe position should the power supply be interrupted.

Brushless motors ensure a service life of 60000 operations
Can be installed with pre-tensioned spring
Manual winding and integral position fixing options allow installation and functional monitoring without electrical connection
Adjustable U-clamp accepts round or square shafts; round sizes 10 to 25.4 mm and square shafts 10 to 18 mm across flats, and 14 to 25.4 mm diagonal
Direction selector
IP54 rated
150 second motor run time
1 metre pre-wired cable
Stock nos. 712-2668 & 712-2652 feature an integrated 2xSPDT 6 (3)A 250Vac auxiliary switch


cULus according to UL 60730-1A and UL 60730-2-14 and CAN/CSA E60730-1:02 Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14

Attribute Value
Return Type Spring Return
Maximum Damper Area 4m²
Damper Spindle Compatibility 10 → 25.4mm
Switch Included Yes
Power Consumption 6.5W
Control Type Open/Close
Supply Voltage 230 V ac
Motor Torque 20Nm
Return Torque 20Nm
Noise Level 45dB(A)
Maximum Damper Spindle Size 25.4mm
Minimum Damper Spindle Size 10mm
Discontinued product