The Mars 12225 is a round run capacitor rated at 50UF with a ±6% capacitance tolerance and a 370VAC voltage rating, engineered to deliver consistent, dependable performance in residential and light commercial HVAC applications. Designed as a direct replacement for failed or degraded run capacitors, this unit helps maintain proper motor efficiency and extends the service life of compressors, condenser fan motors, and blower motors.
Key Features
- Capacitance: 50UF ±6%
- Voltage Rating: 370VAC
- Round form factor for easy installation in standard capacitor brackets
- Suitable for use with compressors, condenser fan motors, and blower motors
- Designed for residential and light commercial HVAC systems
Why Run Capacitors Matter
Run capacitors provide the continuous phase-shifted current needed to keep single-phase motors running smoothly and efficiently. A properly rated capacitor reduces motor amp draw, minimizes heat buildup, and helps prevent premature motor failure — making timely replacement critical to system reliability.
Application
- Air conditioning condensing units
- Heat pump systems
- Condenser fan motors
- Blower and air handler motors









