The Mars 11990 is a heavy-duty start capacitor engineered to deliver the high-torque boost needed to get HVAC compressors and motors up to operating speed quickly and reliably. With a capacitance range of 430–516 MFD and a dual voltage rating of 250/220V, this capacitor is a versatile replacement suitable for a wide range of residential and light commercial HVAC applications.
Key Features
- Capacitance Range: 430–516 MFD (microfarads)
- Voltage Rating: 250/220V
- Designed for motor starting duty in HVAC compressors and fan motors
- Wide MFD range allows compatibility across multiple equipment models
- Durable construction for long service life in demanding HVAC environments
- Direct replacement for failed or degraded OEM start capacitors
Application
Start capacitors are used in single-phase motors to provide the extra phase shift and current surge required during motor startup. Once the motor reaches operating speed, the start capacitor is switched out of the circuit. The Mars 11990 is ideal for use in air conditioner compressors, heat pump compressors, and other single-phase HVAC motors requiring a high-MFD start capacitor.
Why Choose Mars Capacitors?
Mars (Motors & Armatures) is a trusted name in HVAC electrical components, known for producing reliable, high-quality capacitors that meet or exceed OEM specifications. The 11990 is a go-to replacement part for HVAC technicians looking for a dependable, cost-effective solution in the field.







