Overview Honeywell MS8103 spring return, direct-coupled, line voltage actuator Features 27lb-in. (3Nm) torque Accepts two-position (SPST) control for air dampers, air handlers, ventilation flaps, louvers and ball valves. Product SpecificationsApplicationHVACDimensions (in.)6 81/54 high x 3 55/84 wide x 3 5/32 deepDimensions (mm)177 mm high x 98 mm wide x 80 deepIncludesMounting bracket, self-centering shaft adapterWeight (lb)3.5 lbWeight (kg)1.6 kgMaterialsPlenum rated plastic housingMountingDirect CoupledFrequency50 Hz; 60 HzApprovals, Underwriters Laboratories Inc.UL 873Electrical ConnectionsEnclosed screw terminal strip (22 to 14 AWG)Operating Humidity Range (% RH)5 to 95% RH, non-condensingSupply Voltage24 Vac or VdcPower ConsumptionDriving-- 6/3 VAShipping and Storage Temperature Range (F).-40 F to +150FShipping and Storage Temperature Range (C).-40 C to +65 CApprovals, CEEMC 2004/108/EC; Certification Low Voltage Directive 2006/95/EC; IEC 60730-1 and Part 2-14Approvals, Canadian Underwriters Laboratories Inc.cUL C22.2 No. 24-93Ambient Temperature Range (F).-22 F to +149FAmbient Temperature Range (C).-30 C to +65 CApprovals, C-TickN314Environmental, Electrical or Ingress Protection RatingNEMA 2; IP54Internal Auxiliary Switch0Maximum Noise RatingDriving (dB(A) @ 1m)-- 50; Holding (dB(A) @ 1m)-- 20 (no audible noise)Stroke95 ±3 degreesShaft Dimensions (in.)3/8 to 5/8 in. round or 1/4 to 1/2 in. squareActuator TypeDamper; ValveControl SignalTwo position; SPSTFail Safe ModeSpring ReturnTorque Rating (lb-in.)44 lb-in.Torque Rating (Nm)5 NmSpring Return Torque/Force (lb-in., lbf)44 lb-in.Spring Return Torque/Force (Nm, N)5 NmAdditional Torque Ratings (lb-in.)Maximum Stall-- 105 lb-in.Additional Torque Ratings (Nm)Maximum Stall-- 12 NmExternal Auxiliary Switches AvailableNoRotation to OpenBy switchRotational Stroke AdjustmentMechanically limited 5 degree incrementsTiming, NominalDriving @ 60 Hz-- 45 secSpring Return TimingMaximum-- 25 secShaft Adapter TypeSelf-centering clampingManual operationN/AShaft Dimensions (mm)9 to 16 mm round or 6 to 13 mm squareSpring Return DirectionBy orientation