Marley Engineered Products 3900-0361-888 Motor

The Marley Engineered Products 3900-0361-888 is a high-performance 1/20 HP industrial motor engineered for reliable operation in demanding HVACR environments. This triple-voltage unit is designed to operate on 208-240/480V systems at 60Hz, providing extreme field flexibility for contractors servicing diverse commercial and industrial heating applications. Featuring a counterclockwise (CCW) rotation and a robust 1800 RPM speed rating, this motor is the designated updated replacement for the legacy 3900-0361-500 and 3900-0361-501 models. It is frequently utilized in Marley MUH and HUH series unit heaters, such as the MUH152 and MUH158, ensuring original equipment performance and precise fitment. The motor's construction includes a durable frame and a 5/16-inch diameter shaft measuring 3-1/2 inches in length, specifically balanced to minimize vibration and extend the service life of fan assemblies and drive components.

• Multi-Voltage Versatility: Seamlessly integrates into 208V, 240V, and 480V electrical configurations, reducing the need to carry multiple SKUs on service trucks.
• OEM Compatibility: Serving as the direct successor to the 3900-0361-500, it ensures a drop-in replacement without the need for mounting bracket modifications.
• Industrial Build Quality: High-grade materials provide superior resistance to corrosion and thermal stress, maintaining 1.0/0.5 amp efficiency under load.
• Optimized Performance: The 1800 RPM output and CCW shaft end rotation are specifically tuned for effective heat dissipation in industrial forced-air systems.

What unit heaters are compatible with the 3900-0361-888?
This motor is the primary replacement part for Marley QMark and Berko MUH series heaters, specifically models MUH152, MUH158, and various HUHAA configurations. It also serves as an alternative for legacy Century 657 and Emerson CA2H/CA2G series motors.

How should the multi-voltage leads be wired?
For 208-230V operation, typically the orange (line 1) and blue/white (line 2) leads are used. For 480V applications, the orange lead remains line 1 while the white lead is generally unused and red/blue leads are capped. Always verify the wiring diagram on the motor nameplate for site-specific requirements.

Can this motor replace other 1/20 HP motors?
While the 1/20 HP rating is common, you must verify the 4-5/16 inch body diameter, 5/16 inch shaft diameter, and CCW rotation to ensure compatibility with your existing fan blade and housing.

This item is not eligible for free shipping.

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.