Mars 12934 Oval Run Capacitor 15 Mfd 440V

Product Description

The MARS 12934 is an oval run capacitor rated at 15 microfarads (MFD) and 440 volts, designed for single-phase motor starting and running applications in HVAC equipment. Run capacitors maintain a continuous phase shift in motor windings to keep compressors, condenser fan motors, and air handler blower motors running smoothly and efficiently. The oval form factor is a common configuration found in residential and light commercial equipment. HVAC technicians install this capacitor as a direct replacement when the original has failed due to bulging, low capacitance readings, or open circuit conditions confirmed by meter testing.

The MARS 12934 is suited for use in residential and light commercial HVAC systems where a single 15 MFD, 440-volt oval capacitor is required. Typical applications include condenser unit fan motors and single-phase compressor run circuits. It is sold as a single unit, making it a straightforward one-for-one replacement during a service call. The 440-volt rating provides margin over standard 370-volt circuits, which is an accepted practice in the field and helps extend service life under thermal stress.

Key Features

• 15 MFD capacitance rating for single-phase motor run circuits
• 440-volt rating compatible with standard 370-volt and 440-volt HVAC systems
• Oval form factor matches common OEM capacitor footprints
• Sold as a single replacement unit
• Identified by manufacturer part number 12934 for straightforward sourcing

Compatibility

Designed as an OEM-style replacement oval run capacitor for residential and light commercial HVAC systems requiring a single 15 MFD, 440-volt capacitor in condenser fan motor or compressor run circuits.

Installation Notes

Run capacitor replacement is performed by licensed HVAC technicians. Disconnect and lock out all power to the unit before handling any capacitor, and discharge the capacitor using an approved resistive discharge tool before removing wiring - stored charge can be lethal even after power is removed. Match the MFD rating exactly to the original specification; voltage rating may meet or exceed the original. Follow local codes and manufacturer guidelines when completing the repair.