GE Mars SE 5811 Fan Motor

The MARS 5811 (GE 5KSM51AGL5946) is a heavy-duty, cast iron unit bearing fan motor engineered for commercial refrigeration and condenser applications. Operating at 115V with a 16-watt output, this shaded pole motor features a NEMA 51 frame and a 3-1/2 inch diameter, making it a drop-in replacement for various OEM evaporators. The 1550 RPM single-speed operation is optimized for CWOSE rotation (Clockwise Opposite Shaft End), providing consistent airflow in demanding environments. Built with a sleeve bearing system and rated for all-angle mounting, this unit utilizes Class B insulation and is thermally protected to withstand ambient temperatures up to 70°C. This refrigeration fan motor comes complete with a vibration dampener, speed nut, and screws, ensuring a rigid mount installation that minimizes resonance and operational noise in 50/60 Hz systems.

• Universal Mounting: The all-angle mounting capability and rigid base design allow for flexible installation in tight mechanical configurations.
• Substantial Build Quality: Constructed with a cast iron housing for superior heat dissipation and structural integrity compared to aluminum alternatives.
• Reliable Protection: Integrated impedance and overload thermal protection prevents winding failure during restricted airflow conditions.
• High Ambient Rating: Rated for 70°C (158°F), making it suitable for high-heat condenser environments where standard motors might fail.

What is the shaft size for the MARS 5811?
This motor features a 1/4" diameter shaft with a 1/2" length, specifically designed to fit standard refrigeration fan blades and hubs.

Does this unit bearing motor require a capacitor?
No, the MARS 5811 is a shaded pole motor and does not require a start or run capacitor for operation.

Can I use this motor in 50Hz and 60Hz applications?
Yes, the motor is rated for both 50/60 Hz frequencies, providing a consistent 1.00 Full Load Amp draw across standard residential and light commercial power supplies.

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.