Rheem-Ruud 43-101665-57 Dual Run Capacitor 80/5 uF 440 VAC Round

The Rheem-Ruud 43-101665-57 is a genuine OEM dual run capacitor rated at 80/5 µF (microfarad) at 440 VAC, housed in a compact round can. Dual run capacitors — sometimes called dual round capacitors or dual motor run capacitors — serve two functions in one component: they provide continuous operating capacitance for both the compressor and the condenser fan motor simultaneously, reducing component count and simplifying installation.

Key Features:

• Capacitance: 80 µF (compressor) + 5 µF (fan) — dual section in a single round housing
• Voltage Rating: 440 VAC — compatible with standard 370 VAC and 440 VAC HVAC applications
• Shape: Round — industry-standard round can design with HERM, FAN, and C terminals
• Frequency: 50/60 Hz compatible
• OEM Part: Genuine Rheem-Ruud replacement part — engineered and tested to original equipment specifications
• UL Listed: Certified to UL 810 standards for motor run capacitors
• No PCBs: Free of polychlorinated biphenyls

This dual run capacitor is a direct OEM replacement designed for use in Rheem and Ruud air conditioning and heat pump systems. A weak or failed run capacitor is one of the most common causes of compressor hard starts, fan motor failure, and reduced system efficiency. Replacing it with a genuine OEM part ensures proper microfarad tolerance and long-term reliability. Part number: 43-101665-57.