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The RECTORSEAL M12009 is a 12.5 microfarad (MFD), 370-volt oval run capacitor used in single-phase motor circuits found in HVAC equipment. Run capacitors maintain a continuous phase shift in the start winding during normal motor operation, improving efficiency and keeping the motor running smoothly under load. This unit is rated at 12.5 MFD and 370 volts, making it suitable for compressors, condenser fan motors, and air handler blower motors where those specifications are required. Installation is typically performed by a licensed HVAC technician as part of a routine service call or component replacement.
Oval run capacitors in this voltage and capacitance range are commonly used in residential and light commercial HVAC systems. The oval form factor is a widely used configuration in split-system air conditioners, heat pumps, and package units. This capacitor fits into standard capacitor brackets and enclosures designed for oval-style units. It is a direct replacement in applications where the original equipment calls for a 12.5 MFD, 370-volt oval run capacitor.
Designed as an OEM-style replacement for residential and light commercial HVAC systems requiring a 12.5 MFD, 370-volt oval run capacitor in compressor or condenser fan motor applications.
Run capacitor replacement is performed by a licensed HVAC technician. Always disconnect and lock out power to the unit before servicing capacitors, and discharge the capacitor fully before handling, as capacitors retain a charge even after power is removed. Verify the replacement capacitor matches the MFD rating and voltage rating of the original before installation. Work should comply with applicable local electrical codes and NEC guidelines.
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