• Brushless DC submotor with electronic stall protection on all models
• Self-centering shaft adaptor (shaft coupling) for wide range of shaft sizes
• Models available for use with two-position, SPST, line- (Series 40) or low- (Series 80) voltage controls
• Models available for use with floating or switched SPDT (Series 60) controls
• Models avail able for use with proportional current or voltage (Series 70) controls
• Models available with combined floating and modulating control in a single device
• Models available with an internal end switch
• Models available with three-foot, 18 AWG color-coded cable.
• Access cover to facilitate connectivity
• Durable plastic housing with built-in mechanical end limits
• Spring return direction field selectable
• Shaft position indicator and scale
• UL (cUL) listed and CE compliant
• All models are plenum rated per UL87324V SPRING RETURN ON/OFF 44" lb DCA| Rotation to Open | By switch |
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| Overview | The MS8103 is a 27 lb-in (3Nm), spring return direct-coupled, line voltage actuator that accepts two-position (SPST) control for: air dampers, air handlers, ventilation flaps, louvers, and ball valves. |
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| Torque/Force (lb-in., lbf) | 27 lb-in. |
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| Fail Safe Mode | Spring Return |
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| Number of Internal Auxiliary Switch | 0 |
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| Control Signal | Two position |
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| Temperature Ratings (Shipping)(F) | .-40 F to +150F |
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| Temperature Ratings (Shipping)(C) | .-40 C to +65 C |
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| Ingress Protection Rating | IP54 |
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| Shaft Adapter Type | Self-centering clamping |
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| Spring Return Torque/Force (lb-in., lbf) | 27 lb-in |
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| Spring Return Torque/Force (Nm, N) | 3 Nm |
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| Maximum Stall Torque/Force (lb-in., lbf) | 70 lb-in. |
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| Maximum Stall Torque/Force (Nm, N) | 8 Nm |
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| Rotational Stroke | 95 ±3 degrees |
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| Rotational Stroke Adjustment | Mechanically limited 5 degree increments |
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| Spring Return Direction | By orientation |
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| Timing, Maximum Spring Return (sec) | 25 sec |
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| Timing, Nominal Driving @ 60 Hz (sec) | 45 sec |
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| Compatible Damper Shafts (in.) | 3/8 to 5/8 in. round or 1/4 to 1/2 in. square |
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| Compatible Damper Shafts (mm) | 9 to 16 mm round or 6 to 13 mm square |
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| Materials | Plenum rated plastic housing |
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| External Auxiliary Switches Available | No |
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| Power Consumption (Driving) | 6/3 VA |
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| Dimensions (in.) | 6 81/54 high x 3 55/84 wide x 3 5/32 deep |
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| Electrical Connections | Enclosed screw terminal strip (22 to 14 AWG) |
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| Temperature Range, Ambient (F) | .-22 F to +149F |
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| Dimensions (mm) | 177 mm high x 98 mm wide x 80 deep |
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| Temperature Range, Ambient (C) | .-30 C to +65 C |
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| Temperature Range, Storage (F) | .-40 F to +150F |
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| Temperature Range, Storage (C) | .-40 C to +65 C |
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| Maximum Noise Rating, Driving (dB(A) @ 1m) | 50 |
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| Maximum Noise Rating, Holding (dB(A) @ 1m) | 20 (no audible noise) |
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| Environmental Rating | NEMA2 |
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| Approvals, Canadian Underwriters Laboratories | cUL C22.2 No. 24-93 |
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| Approvals, CE | EMC 2004/108/EC; Certification Low Voltage Directive 2006/95/EC; IEC 60730-1 and Part 2-14 |
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| Operating Humidity Range (% RH) | 5 to 95% RH, non-condensing |
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| Approvals, Underwriters Laboratories Inc | UL 873 |
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| Includes | Mounting bracket, self-centering shaft adapter |
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Product Family
All orders are shipped same-day if the order is received by 1:00 PM Central Time. We ship worldwide.
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You can also find answers to some common questions on our FAQ page
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