Rectorseal m12933 Oval Run Capacitor 12.5 Mfd 440V

Product Description

The RECTORSEAL m12933 is an oval run capacitor rated at 12.5 microfarads (MFD) and 440 volts, designed for use in single-phase HVAC motors. Run capacitors maintain a continuous phase shift in the start and run windings of PSC motors, allowing the motor to operate efficiently under load. This oval-bodied capacitor is a standard form factor found throughout residential and light commercial HVAC equipment. Licensed HVAC technicians typically replace these components during compressor, condenser fan motor, or blower motor service calls when capacitance has drifted out of spec or the unit has failed outright.

This capacitor is suited for use with condenser fan motors, compressor start and run circuits, and air handler blower motors in residential and light commercial systems. Oval run capacitors in the 12.5 MFD 440-volt range are among the most common service replacements in the field. The 440-volt rating provides compatibility across both 208-volt and 240-volt single-phase applications, making this a versatile stock item for service vans and supply rooms.

Key Features

• 12.5 MFD capacitance rating for precise motor phase correction
• 440-volt rating suitable for 208-volt and 240-volt single-phase circuits
• Oval form factor fits standard HVAC capacitor mounting brackets
• Continuous-duty rated for sustained run-circuit operation

Compatibility

Designed as an OEM-style replacement run capacitor for single-phase PSC motors in residential and light commercial HVAC systems requiring a 12.5 MFD 440-volt oval capacitor.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before handling capacitors, as capacitors can retain a dangerous charge even after power is removed — discharge the capacitor through a resistor before touching terminals. Verify the replacement MFD rating matches the motor nameplate specification within the manufacturer-allowed tolerance before installing. Follow all applicable NEC requirements for electrical service and disconnecting means.