Rheem-Ruud 43-25133-04 Run Capacitor

The Rheem-Ruud 43-25133-04 Run Capacitor is a high-spec dual round run capacitor specifically designed for high-demand HVACR applications. For technicians servicing Rheem or Ruud equipment, this component provides the precise 40/3 MFD capacitance required to support both the compressor and the condenser fan motor simultaneously. Built to withstand rigorous operational cycles, it features a 370 VAC voltage rating and is housed in a compact round casing measuring 2.120 inches in diameter with a maximum height of 4.000 inches.

When diagnosing weak motor starts or failed compressors, utilizing a UL 810 certified capacitor ensures the circuit is protected by an internal pressure-sensitive interrupter. This unit is safety tested for 5,000 AFC (Available Fault Current), offering a critical layer of protection for the HVAC system’s electrical integrity. Whether you are performing routine maintenance or an emergency service call, the 43-25133-04 HVAC replacement part delivers the stable electrical phase shift necessary for efficient motor performance and optimal heat pump or air conditioner operation.

Key Benefits for Technicians:

• Dual-Microfarad Design: Combines 40 MFD (Herm) and 3 MFD (Fan) ratings to service both primary system motors from one mounting point.
• Rugged Build Quality: High-grade aluminum construction and oil-filled design for superior heat dissipation in demanding environments.
• Standardized Fit: The 2.120" round diameter ensures compatibility with standard mounting brackets found in Rheem and Ruud outdoor units.
• Industry Compliance: Meets strict UL 810 safety standards, including a 5,000 AFC fault protection rating for contractor peace of mind.
• OEM Compatibility: Specific physical and electrical properties ensure direct replacement for legacy Protech and Rheem model numbers.

Common Technical Questions:

Can I use a 440V capacitor to replace this 370V 40/3 MFD run capacitor?
Yes, a higher voltage rating (440V) is a safe upgrade as it indicates the capacitor's ability to handle more electrical stress; however, the microfarad (MFD) rating must remain exactly 40/3 MFD for proper motor torque and efficiency.

What are the symptoms of a failing 43-25133-04 capacitor?
Common indicators include a humming sound from the compressor, the condenser fan failing to spin without manual assistance, or the top of the capacitor casing becoming "bulged" or distorted.

Does this capacitor include a mounting bracket?
This is a standard round can capacitor; it is designed to fit existing strap-style or wraparound mounting brackets found in most Rheem and Ruud condensing units.

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.