Honeywell MS8105A1030 Actuator

For mid-torque spring return performance, the Honeywell MS8105A1030 provides a reliable 44 lb-in (5 Nm) DCA solution for 2-position (On/Off) control of HVAC air dampers and ball valves. This 24V direct-coupled actuator is engineered for high-cycle longevity in restrictive plenum spaces, featuring a 45-second drive time and a dependable spring return fail-safe that ensures the system defaults to its required position during power loss. This model is a direct technical superior to the MA4D-8033-100 and MS8105A1008, incorporating a self-centering shaft adapter that handles round shafts from 3/8" to 5/8" and square shafts from 1/4" to 1/2". With a NEMA 2/IP54 rating and 95-degree rotational stroke, it integrates seamlessly into industrial ventilation, air handlers, and louver systems where low noise operation and precision mechanical end limits are mandatory for system balance.

• Direct Replacement: Verified drop-in substitute for the Honeywell MA4D-8033-100, reducing field modification time.
• Fast Response: Features a 45-second nominal drive time for rapid response to SPST control signals.
• Versatile Mounting: The direct-coupled design eliminates complex linkages, allowing for faster installation on various shaft shapes.
• Fail-Safe Security: Robust spring return mechanism provides 44 lb-in torque to shut or open dampers immediately upon power failure.
• Field Flexibility: Includes a field-selectable spring return direction and an enclosed screw terminal strip for secure wiring.

• Can this actuator replace a modulating model? No, the MS8105A1030 is a two-position (on/off) actuator. If your controller outputs a 2-10VDC or 4-20mA signal, you will need a modulating series model like the MS7505.
• Does this allow for manual override? This 44 lb-in series relies on the spring return mechanism; manual override via a crank is typically reserved for higher torque models in the S10 or S20 series.
• What is the maximum stall torque? While the rated operating torque is 44 lb-in, the maximum stall torque is rated up to 105 lb-in to prevent gear damage under excessive load.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.