Honeywell MS4105A1030 Actuator

The Honeywell MS4105A1030 is a high-performance spring return direct coupled actuator within the Zelix S05 Series, engineered for reliable control in HVACR systems. As a veteran-grade line voltage actuator, it provides 44 lb-in (5 Nm) of torque and is designed to drive quarter-turn final control elements like dampers, ball valves, and butterfly valves. This two-position (SPST) unit operates on 100-250Vac, making it a versatile choice for varying electrical environments. With a 45-second nominal driving time and a fast 25-second maximum spring return, it ensures rapid fail-safe operation during power loss. The self-centering clamping shaft adapter simplifies installation on various shaft sizes, while the NEMA 2 rated housing and enclosed screw terminal strip provide durability in demanding mechanical rooms. This model serves as the primary technical replacement for the Belimo LF230 and MA40-7041, offering drop-in compatibility for common damper actuator replacement projects.

• Universal Compatibility: Serves as a direct replacement for LF230 and MA40-7041 models, reducing truck stock requirements.
• Reliable Fail-Safe: Integrated mechanical spring return ensures dampers or valves return to the safe position in under 25 seconds upon power failure.
• Efficient Installation: The self-centering shaft adapter eliminates the need for field-fabricated mounting brackets on most standard damper shafts.
• Wide Operating Range: Sustains performance across a humidity range of 5-95% RH and handles various line voltages from 100 to 250Vac.
• Robust Construction: Features electronic stall protection to protect the motor from damage if the damper becomes obstructed.

Is the Honeywell MS4105A1030 compatible with 230V systems?
Yes, its internal power supply is rated for 100-250Vac, allowing it to function reliably on both 120V and 230V circuits common in commercial HVACR applications.

Can I change the spring return direction?
The spring return direction is field-selectable. By simply flipping the actuator over on the shaft, you can determine if the fail-safe position is clockwise (CW) or counter-clockwise (CCW).

What damper sizes can this actuator handle?
With a 44 lb-in torque rating, this actuator is typically sized for dampers up to approximately 11 square feet, depending on the damper manufacturer's torque requirements and air velocity.

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.