Description
The Regal Rexnord Marathon X503 is a heavy-duty commercial condenser fan motor engineered for reliable, long-life performance in demanding HVAC applications. Built around a robust 56Y frame with a belly band (footless) mounting configuration, this motor installs easily into a wide range of condenser unit assemblies without the need for a base mount.
Motor Overview
Designed for three-phase power systems, the X503 operates on 200-230/460 VAC, making it compatible with both standard commercial voltages and higher-voltage industrial installations. Running at 1200 RPM, it delivers steady, low-speed airflow ideal for condenser fan duty — reducing noise and extending component life compared to higher-speed alternatives.
Key Specifications
- Horsepower: 1-1/2 HP (1.5 HP)
- Voltage: 200-230/460 VAC
- Phase: Three Phase
- Speed: 1200 RPM
- Amperage: 5.5-5.4 / 2.7 Amps
- Frame Size: 56Y
- Enclosure: Open Air-Over (OAO)
- Bearing Type: Ball Bearing
- Mounting: Belly Band – Footless
- Brand: Regal Rexnord / Marathon
- SKU: X503
Design & Construction
- Open Air-Over enclosure allows airflow from the driven load to cool the motor, optimizing thermal performance in condenser fan applications
- Precision ball bearings provide smooth operation, reduced friction, and extended service life under continuous-duty cycles
- 56Y frame ensures broad cross-compatibility with OEM and replacement condenser fan assemblies
- Belly band (footless) mounting simplifies installation in shroud-mounted and bracket-mounted configurations
- Three-phase design delivers consistent torque and efficiency, ideal for commercial rooftop units, condensing units, and cooling towers
Applications
- Commercial and industrial condenser fan duty
- Rooftop HVAC units
- Air-cooled condensing units
- Cooling towers and evaporative condensers
- OEM replacement and field retrofit installations
Why Choose the Marathon X503?
Regal Rexnord’s Marathon line is trusted by HVAC professionals for its consistent quality, broad application coverage, and availability. The X503 combines a field-proven 56Y frame with ball bearing construction and a flexible dual-voltage winding, giving technicians a single motor solution for a wide range of three-phase condenser applications.
Reviews
There are no reviews yet.