Rheem-Ruud 51-101728-05 Motor

The Rheem-Ruud 51-101728-05 Motor is a heavy-duty, 1/2 HP blower motor designed for reliable performance in residential and light commercial HVAC systems. This direct drive blower motor operates at 208-230V and 1075 RPM, offering a 2-speed configuration to optimize airflow across various heat pump and air handler applications. Built with a 48 Nema frame size, it features an Open Air Over (OAO) enclosure that facilitates efficient heat dissipation, while the sleeve bearing design ensures quiet, low-vibration operation in standard mounting positions. This PSC motor requires a permanent split capacitor for startup and peak efficiency. The unit utilizes a shell-band mount and comes with a 1/2" x 4 1/4" shaft. With a 3.4 Amp draw and CCW rotation, this OEM replacement motor is a drop-in solution for many Rheem and Ruud indoor blower assemblies, ensuring strict adherence to factory specs for static pressure and air volume.

Key Benefits

• Universal 48 Frame Design: Simplifies installation in legacy Rheem and Ruud air handlers and furnaces.
• Dual-Speed Versatility: Allows for precise airflow adjustments to meet specific system CFM requirements.
• Sleeve Bearing Construction: Optimizes noise reduction and provides longevity in indoor environments.
• OEM Compatibility: Replaces specific factory parts without the need for mounting modifications or bracket adjustments.
• High-Efficiency PSC Operation: Maintains consistent torque and reduces electrical consumption compared to base induction motors.

Common Questions

Is the 51-101728-05 a drop-in replacement for motors with different shaft lengths?
This motor features a 4 1/4" shaft. If your current motor has a longer shaft, you must verify the blower wheel clearance. If it is shorter, ensure the set screw on the turbine wheel can still seat properly on the flat of the shaft.

What capacitor does this Rheem 1/2 HP motor require?
Always check the nameplate of the new motor for the specified MFD rating. Typical 1/2 HP 230V motors utilize a 7.5 MFD or 10 MFD at 370V/440V, but the capacitor must match the motor specifications to avoid winding failure.

Can I use this motor if my original unit was 115V?
No. This is a 208-230V single-phase motor. Applying 115V will cause the motor to fail to start or overheat, while applying it to a 460V line will result in immediate failure.

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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.