Mars Controls MARS-14257 Dual Run Capacitor 80/5 Mfd 440/370V

Product Description

The Mars Controls MARS-14257 is a dual-section motor run capacitor in a round form factor, rated at 80/5 microfarads (MFD) and 440/370 volts. It operates on 50/60 Hz systems, making it suitable for both North American and international-frequency applications. Dual run capacitors serve two motor windings simultaneously, providing the start and run assist needed for the compressor and the condenser fan motor within a single enclosure. HVAC technicians install this capacitor as a direct replacement when original components fail, restoring proper motor starting torque and run efficiency in split-system air conditioners and heat pumps.

This capacitor is used in residential and light-commercial HVAC equipment where a single round dual-section capacitor powers both the compressor and condenser fan motor. The 440-volt rating provides a safety margin above standard 240-volt equipment, and the 370-volt rating satisfies minimum OEM requirements on many units. It is a common replacement item for HVAC service technicians performing seasonal tune-ups, capacitor failure callbacks, or component-level troubleshooting on condensing units.

Key Features

• Dual-section design powers compressor and condenser fan motor from one capacitor
• 80/5 MFD capacitance rating covers high-draw compressor and lower-draw fan motor simultaneously
• 440/370-volt rating suits a wide range of residential and light-commercial condensing units
• Round form factor fits standard capacitor mounting brackets and clips
• 50/60 Hz compatibility supports standard North American HVAC system frequencies

Compatibility

Designed as an OEM-style replacement dual run capacitor for residential and light-commercial air conditioning and heat pump condensing units requiring an 80/5 MFD, 440/370-volt round capacitor.

Installation Notes

Capacitor replacement is performed by licensed HVAC technicians. Shut off all power at the disconnect and verify zero voltage with a meter before handling the capacitor, as a failed capacitor can retain a dangerous charge. Discharge the capacitor through a resistor before removing wiring. Follow all local codes and manufacturer wiring diagrams when reconnecting terminals.

Technical Specifications

• Capacitance: 80/5 MFD
• Voltage Rating: 440/370 volts
• Frequency: 50/60 Hz
• Product Type: Dual Section Motor Run Round

Standard Information

• Brand: Mars Controls
• Manufacturer Part Number: MARS-14257