Description
The Mars 12931 is a 7.5 microfarad (MFD), 440VAC oval run capacitor engineered to maintain consistent motor performance in air conditioning, heat pump, and refrigeration systems. Run capacitors remain energized throughout motor operation, providing the phase-shifted current needed to keep single-phase motors running smoothly and efficiently.
Key Features
- Capacitance: 7.5 MFD (microfarad)
- Voltage rating: 440VAC
- Oval form factor for easy installation in tight equipment spaces
- Designed for continuous-duty run capacitor applications
- Compatible with condenser fan motors, compressors, and blower motors
- Mars brand reliability trusted by HVAC professionals nationwide
Applications
- Residential and light commercial air conditioning systems
- Heat pump condenser and air handler units
- Refrigeration equipment motor circuits
- Single-phase PSC (Permanent Split Capacitor) motor circuits
Why Choose a Mars Run Capacitor?
Mars run capacitors are a go-to choice for HVAC technicians and contractors seeking dependable, long-lasting electrical components. The oval housing allows for flexible mounting in confined equipment cabinets, while the 440VAC rating provides a safe operating margin above the standard 370VAC found in many residential systems — making this capacitor a versatile replacement option across a wide range of equipment brands and models.
Installation Notes
- Always discharge capacitor before handling
- Match MFD rating exactly to OEM specification for proper motor operation
- 440VAC-rated capacitors may replace 370VAC-rated units of the same MFD value
- Verify terminal configuration and physical dimensions prior to installation
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