Mars 12931 Motor Run Capacitor 7.5 Mfd 440V Oval

Product Description

The MARS 12931 is a 7.5 microfarad (MFD) oval motor run capacitor rated at 440 volts AC, designed to support continuous operation of fan and compressor motors in HVAC systems. Compatible with 50/60 Hz applications, this capacitor maintains the phase shift needed to keep single-phase motors running efficiently after startup. The copper construction supports reliable conductivity across the service life of the component. HVAC technicians install this capacitor as a direct replacement when a failed or weak run capacitor causes motor sluggishness, high amp draw, or hard starting.

This capacitor is suited for residential and light commercial HVAC applications where a dual-rated or single-value oval run capacitor is required. The oval form factor is common in condenser units and air handlers where space is defined by the capacitor bracket. It is appropriate for use with both fan motors and compressor motors operating on 440-volt circuits, making it a versatile service stock item for technicians running a route.

Key Features

• 7.5 MFD capacitance supports stable motor run performance on fan and compressor loads
• 440-volt AC rating provides margin for typical residential and light commercial line voltage
• Rated for 50/60 Hz motor applications
• Oval case fits standard capacitor brackets in condenser and air handler cabinets
• Copper internal construction for reliable conductivity

Compatibility

Designed as an OEM-style replacement run capacitor for single-phase fan and compressor motors in residential and light commercial HVAC equipment rated at 440 volts AC.

Installation Notes

A licensed HVAC technician should perform capacitor replacement. Disconnect and lock out all power to the unit before handling any capacitor, and discharge the existing capacitor through a resistor before touching terminals, as run capacitors can retain a dangerous charge after power is removed. Match the MFD rating and voltage rating exactly when selecting a replacement. Refer to the equipment wiring diagram for correct terminal connections.