Mars M12927 Oval Run Capacitor 3 Mfd 440V

Product Description

The MARS M12927 is a single-section oval run capacitor rated at 3 microfarads (MFD) and 440 volts, designed for use in HVAC motor circuits. Run capacitors maintain a continuous phase shift in the start and run windings of single-phase AC motors, improving efficiency and torque throughout the operating cycle. This capacitor is a direct replacement component installed by licensed HVAC technicians during routine maintenance, motor replacement, or capacitor failure diagnosis. Its oval form factor is a common footprint found in residential and light commercial air conditioning and heat pump condensing units.

The M12927 is suited for single-phase condenser fan motors and compressor circuits that require a 3 MFD, 440-volt run capacitor. The 440-volt rating provides compatibility across both 370-volt and 440-volt rated systems, making it a widely applicable replacement in residential split systems, package units, and heat pumps where the motor manufacturer specifies this capacitance value.

Key Features

• 3 MFD capacitance rating for precision motor phase shift
• 440-volt rating compatible with 370V and 440V motor circuits
• Oval case design fits standard capacitor brackets and mounting hardware
• Single-section construction for dedicated fan motor or compressor circuits

Compatibility

Designed as an OEM-style replacement for single-phase HVAC motors in residential and light commercial condensing units requiring a 3 MFD, 440-volt oval run capacitor.

Installation Notes

Run capacitors are installed by qualified HVAC technicians. Always disconnect and lock out power to the unit before handling capacitors, and discharge the existing capacitor fully before removal, as capacitors retain voltage after power is cut. Verify the replacement MFD rating and voltage rating match or exceed the original equipment specification before installation. Follow applicable NEC and equipment manufacturer guidelines for wiring and reconnection.

Technical Specifications

• Capacitance: 3 MFD
• Voltage Rating: 440 volts
• Case Style: Oval
• UPC: 685744129271

Standard Information

• Brand: MARS
• Manufacturer Part Number: M12927