Mars 12872 Round Dual Run Capacitor 45/10 Mfd 440V

Product Description

The MARS 12872 is a round dual run capacitor rated at 45/10 microfarads (MFD) and 440 volts AC, designed for use in single-phase HVAC compressor and fan motor circuits. Dual run capacitors serve two motor loads simultaneously from a single can, providing the starting and running capacitance required to maintain efficient motor operation. The round form factor is the industry-standard housing for residential and light commercial condensing units. Licensed HVAC technicians install this component as a direct replacement when diagnosing weak or failed capacitors during routine service calls or compressor hard-start events.

This capacitor is suited for split-system air conditioners and heat pumps where a single round capacitor supports both the compressor and the outdoor fan motor. It is commonly installed in residential condensing units and light commercial rooftop equipment that require a 45/10 MFD dual run capacitor at 440 VAC. The 440-volt rating provides compatibility across both 370-volt and 440-volt rated systems, making it a practical single-stocking replacement for a wide range of equipment in the field.

Key Features

• Dual run design supports compressor and fan motor from one capacitor
• 45/10 MFD rating covers both motor loads in a single unit
• 440 VAC voltage rating is compatible with 370 VAC and 440 VAC systems
• Round form factor fits standard capacitor brackets and mounting hardware
• Sold individually as a single replacement unit

Compatibility

Designed as an OEM-style replacement for residential and light commercial split-system air conditioners and heat pumps requiring a round 45/10 MFD dual run capacitor rated at 440 VAC.

Installation Notes

Dual run capacitors must be installed by a licensed HVAC technician. Always disconnect and lock out power to the condensing unit before servicing. Capacitors store a high-voltage charge even after power is removed - discharge the capacitor through a resistor before handling. Verify the replacement MFD ratings and voltage rating match the nameplate data on the existing capacitor before installation.