Rectorseal m12928 Run Capacitor 4 Mfd 440V Oval

Product Description

The RECTORSEAL m12928 is a 4 microfarad (MFD), 440-volt oval run capacitor designed to maintain a steady phase shift in single-phase motors found in HVAC systems. Run capacitors stay energized throughout motor operation, supplying the continuous current offset that keeps compressor, condenser fan, and blower motors running at correct torque and efficiency. At 4 MFD and 440 volts, this unit is sized for smaller fractional-horsepower motors commonly found in residential and light-commercial HVAC equipment. Licensed HVAC technicians install and replace run capacitors as part of routine seasonal maintenance or in response to motor starting and running faults.

This capacitor is suited for residential and light-commercial HVAC applications where a compact oval form factor is required. The oval housing fits standard capacitor brackets and disconnect boxes. It is a common replacement during condenser or air handler service calls when a failed or out-of-tolerance capacitor is identified as the cause of motor sluggishness, overheating, or failure to start. Its 440-volt rating allows use on both 208-240 volt single-phase circuits, providing a margin of voltage tolerance above typical system operating voltage.

Key Features

• 4 MFD capacitance rating for fractional-horsepower motor applications
• 440-volt rating compatible with 208-240 volt single-phase HVAC circuits
• Oval form factor fits standard capacitor mounting brackets
• Compact dimensions suited for tight equipment compartments

Compatibility

Designed as an OEM-style replacement run capacitor for single-phase motors in residential and light-commercial HVAC equipment requiring a 4 MFD, 440-volt oval capacitor.

Installation Notes

Run capacitor replacement is performed by licensed HVAC technicians. Always disconnect and lock out power to the unit before opening the electrical compartment. Capacitors store a charge even after power is removed — discharge the capacitor safely using an approved discharge tool before handling. Verify MFD rating and voltage rating against the motor nameplate or existing capacitor before installing.

Technical Specifications

• Capacitance: 4 MFD
• Voltage: 440 volts
• Shape: Oval
• Width: 1.21 inches
• Length: 2.06 inches
• Height: 2.0 inches
• Depth: 1.21 inches
• UPC: 685744129288

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: m12928