PEMS 58840A Motor

The PEMS 58840A is a high-efficiency PSC replacement motor specifically engineered for Nutone ventilation systems and fan assemblies. Designed as a direct upgrade to the original Nutone 58840 shaded-pole motor, this 3.3-inch diameter unit provides technical improvements in power density and thermal management. Operating at 1/20 HP, 120V, and 1600 RPM, it utilizes a permanent split capacitor (PSC) design to reduce amperage draw to 0.68A, ensuring cooler operation and a longer service life compared to older shaded-pole technology. The dual-shaft configuration features two 1-3/8" x 5/16" shafts, supported by ball bearings for sustained performance in air-moving applications. Correct rotation is CWLE (Clockwise Facing Lead End), matching standard OEM specifications for the QT300(N) and various JA2R207N series blowers. This motor is a drop-in HVAC replacement part for existing Nutone 58840 and S58840000 configurations, delivering consistent torque for exhaust and circulation equipment.

Key Benefits for Contractors

• Direct Cross-Reference: Replaces Nutone 58840, 825390570, 8253910570, JA24207N, and QT300(N) without cabinet modifications.
• PSC Efficiency Upgrade: Replaces inefficient shaded-pole designs with a capacitor-start run, lowering operational costs and heat generation.
• Industrial Build Quality: Equipped with double-shielded ball bearings to handle vertical or horizontal mounting in high-cycle ventilation units.
• Precision Fit: Dual-shaft dimensions (1-3/8" x 5/16") ensure compatibility with multi-wheel blower assemblies.

Technical Questions & Compatibility

Is the capacitor included with the PEMS 58840A?
Yes, as a PSC motor upgrade, the capacitor is required and integrated or provided to ensure the motor operates at the specified 0.68A rating.

Can this motor replace a single-shaft Nutone motor?
This is a double-shaft fan motor. While it can physically fit in some single-shaft applications if clearance allows, it is specifically designed for dual-wheel blower housings common in Nutone 300 CFM units.

How do I verify the rotation (CWLE)?
Clockwise Lead End (CWLE) means the shaft rotates clockwise when you are looking at the motor from the side where the power wires (leads) exit the housing.

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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.