Rheem-Ruud 43-26271-48 Run Capacitor

Precision-engineered for reliability in demanding cooling applications, the Rheem-Ruud 43-26271-48 Run Capacitor is a high-performance 45/10 MFD 370V dual run capacitor designed for central air conditioning and heat pump systems. As the direct OEM updated version for 43-26261-48, this multifaceted component provides the specific capacitance required to support both the compressor and the condenser fan motor simultaneously. Built to withstand high-duty cycles, this round dual run capacitor features a robust aluminum casing and 1/4" quick-connect terminals clearly labeled for Common (C), Hermetic (HERM), and Fan (FAN) to ensure accurate wiring. Integrating a 45+10 microfarad capacitor of this caliber helps maintain stable voltage and optimal torque, protecting motor windings from premature wear caused by electrical fluctuations. Tested to meet stringent UL 810 safety standards and rated for 50/60Hz operations, this unit is a critical maintenance item for technicians aiming to restore system efficiency and prevent compressor overheating in residential and light commercial units.

Key Benefits

• Direct OEM Replacement: Explicitly designed as the current successor to the 43-26261-48 and 43-101665-48 for a perfect fit in Rheem and Ruud equipment.
• Dual-Action Support: Provides 45 MFD for the compressor and 10 MFD for the fan motor, streamlining parts inventory for HVAC service calls.
• Enhanced Safety: Includes a pressure-sensitive interrupter (PSI) designed to disconnect the capacitor in the event of internal failure, minimizing potential equipment damage.
• Thermal Stability: Engineered to operate reliably in ambient temperatures ranging from -40°C to +70°C, typical of harsh outdoor condenser environments.
• Universal Voltage Compatibility: Rated for 370Vac applications but safe for use in systems requiring lower voltage ratings of the same capacitance.

Common Questions

Can I use a 440V capacitor to replace this 370V model?
Yes, technicians often use 440V rated capacitors to replace 370V units as they can handle a higher peak voltage, provided the MFD (45/10) stays exactly the same.

How do I know if my 43-26271-48 capacitor has failed?
Common field indicators include a "swollen" or bulged top, an audible humming from the compressor without start-up, or a capacitance reading outside the +/- 5% tolerance range when tested with a multimeter.

Does this part solve "short cycling" issues?
If the compressor is struggling to start or dropping out due to low starting torque, replacing a weakened capacitor often stabilizes the run cycle and prevents motor stalling.

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.