Single Run Capacitor, Oval, 4/370 uF

Consistent Performance – PROTECH 4 MFD Oval Run Capacitor (370V) for HVAC Systems

The PROTECH 43-25134-27 single run capacitor is engineered to support fractional horsepower motors in residential and light commercial HVAC applications. With a rated capacitance of 4 microfarads and 370 VAC, it provides stable power correction to fan motors, helping ensure continuous and efficient system operation.

Engineered for Demanding HVAC Applications

Manufactured under stringent quality control, this oval run capacitor is suitable for systems requiring precise performance and durability. It is UL 810 listed and tested to 5000 AFC, making it suitable for field replacement in Rheem, Ruud, and WeatherKing systems requiring OEM specification compliance.

Key Performance Features

• ✅ Rated Capacitance: 4 microfarads (µF)
• ✅ Voltage: 370 VAC – ideal for standard residential fan motor applications
• ✅ Dielectric Fluid: Non-PCB, environmentally compliant
• ✅ Construction: Oval aluminum case for compact installations
• ✅ Safety: Integrated pressure-sensitive interrupter (UL 810 compliant)

Specifications

• Capacitance: 4 µF ±6%
• Voltage Rating: 370 VAC
• Frequency: 50/60 Hz
• Case Dimensions: Approximately 2.16" W x 1.31" D x 1.69" H
• Terminal Type: ¼" quick connect spade terminals
• Approval: UL Recognized (UL 810, 5000 AFC)

Installation Notes

This capacitor is designed for straightforward installation within OEM-specified enclosures. While the form factor supports easy retrofitting, proper discharge of the old capacitor and polarity matching are essential to avoid equipment damage. Installation should be performed by a licensed technician to ensure safety and compliance with applicable electrical codes.

Professional Considerations

For Contractors: This is an OEM-quality replacement with a proven track record in the field. Its stable electrical characteristics and certification ratings ensure it meets both operational demands and code requirements. Stocking this part supports quick replacements without compatibility concerns.

For Technicians: Useful in troubleshooting weak or failed fan motors, this capacitor provides a simple, reliable fix when voltage or amperage anomalies are traced to degraded capacitance. Always verify label values before replacement.

Summary

With a compact form, reliable dielectric construction, and compliance with industry safety benchmarks, the PROTECH 43-25134-27 4 MFD 370V capacitor is an essential component for targeted service and maintenance of Rheem-family HVAC equipment.