Mars M12940 Run Capacitor 25 Mfd 440V Oval

Product Description

The MARS M12940 is a 25 microfarad (MFD), 440-volt oval run capacitor designed for single-phase motor applications in HVAC systems. Run capacitors maintain a continuous phase shift in the motor winding to sustain smooth, efficient motor operation during normal running cycles. This unit is rated at 25 MFD and 440 volts, giving it compatibility with both 370-volt and 440-volt motor circuits — a common requirement for condenser fan motors and compressors in residential and light commercial cooling equipment. Installation is performed by licensed HVAC technicians as part of routine maintenance or component replacement service.

The M12940 oval run capacitor is suited for use in central air conditioning systems, heat pumps, and other single-phase motor-driven HVAC equipment. Oval-style capacitors are widely used where space constraints or mounting clip configurations favor the oval form factor over round units. This capacitor is a common replacement item during cooling season tune-ups and compressor or condenser fan motor changeouts.

Key Features

• 25 MFD capacitance rating for precise motor phase support
• 440-volt rating compatible with 370V and 440V motor circuits
• Oval form factor fits standard HVAC capacitor mounting clips
• Designed for continuous-duty run capacitor service in single-phase motors

Compatibility

Designed as an OEM-style replacement run capacitor for single-phase condenser fan motors and compressors in residential and light commercial HVAC systems requiring a 25 MFD, 440-volt oval capacitor.

Installation Notes

Run capacitor replacement is performed by licensed HVAC technicians. Always disconnect and lock out power to the unit before opening the electrical panel or disconnect box, and discharge any stored voltage in the existing capacitor before handling. Verify the replacement MFD rating and voltage rating match the equipment nameplate before installation. Capacitor work is subject to local electrical codes and NEC guidelines.

Technical Specifications

• Capacitance: 25 MFD
• Voltage Rating: 440 volts
• Shape: Oval
• UPC: 685744129400

Standard Information

• Brand: MARS
• Manufacturer Part Number: M12940