Dual Capacitor, Round, 40/3/370 uF

Performance-Certified – Rheem / Ruud 43-25133-04 Dual Run Capacitor, 40/3 MFD, 370V

The Rheem 43-25133-04 is a dual run motor capacitor engineered for use in Rheem, Ruud, and WeatherKing HVAC systems. It features a capacitance rating of 40/3 microfarads (µF) and is rated for continuous duty at 370 VAC. This round-style capacitor is designed to support both compressor and fan motor operation in split system condensers and air handlers.

Its sealed aluminum case, non-PCB dielectric fluid, and integrated pressure interrupter ensure compliance with UL 810 safety standards. This model is widely used in OEM service and repair applications requiring precise electrical characteristics and form factor compatibility with factory-installed components.

Product Highlights

• ✅ Dual Function – Powers both compressor (40 µF) and condenser fan motor (3 µF) circuits from a single component
• ✅ OEM-Specific Design – Direct replacement for Rheem part number 43-25133-04; maintains factory-intended operation
• ✅ Voltage Rating: 370 VAC, 60 Hz continuous-duty motor run capacitor
• ✅ Construction: Oil-filled, hermetically sealed round aluminum case
• ✅ Pressure Interrupter: Integrated internal disconnect switch protects against catastrophic failure

Technical Specifications

• Capacitance: 40/3 µF ±6%
• Voltage Rating: 370 VAC
• Configuration: Round can, dual-section run capacitor
• Terminals: Standard 1/4" quick-connect, 2 per terminal (COM/HERM/FAN)
• Dimensions: Diameter: 2.12", Height: 4.00"
• Certifications: UL 810 Recognized, 5000 AFC rating

Installation Notes

Installation of this capacitor should be performed by a qualified HVAC technician. Always verify system specifications and wiring diagrams before installation. Power should be disconnected and residual charge discharged from the existing capacitor prior to removal. Terminal placement (COM, HERM, FAN) must match the wiring configuration to prevent motor damage.

Contractor-Focused Use Case

For Service Professionals:

This component supports typical residential A/C compressor and fan motor circuits. Its precise microfarad rating ensures correct phase shifting and torque delivery. Stocking this OEM-rated capacitor reduces downtime during system diagnostics or maintenance on Rheem, Ruud, and WeatherKing units using this model as a factory-specified part.

Common Applications:

• Single-phase air conditioning condensers
• Dual-motor systems (compressor and fan)
• Rheem and Ruud OEM replacement service

Key Features Summary

• ✅ Exact OEM Replacement – Manufactured to original Rheem/Ruud specifications
• ✅ High-Cycle Durability – Rated for continuous motor operation
• ✅ Integrated Thermal Interrupter – Prevents overheating and protects windings
• ✅ Aluminum Canister with Oil-Filled Core – Ensures long service life in elevated ambient temperatures

Conclusion

The Rheem 43-25133-04 Dual Run Capacitor is a field-proven, contractor-preferred solution for HVAC motor phase correction and sustained operation. With a 40/3 µF split and 370V rating, it delivers reliable, OEM-level performance across cooling cycles. Choose this capacitor for consistent system performance and trusted equipment compatibility.