Mars Dual Run Capacitor Round

The Mars Dual Run Capacitor in a round case is a motor run capacitor for HVAC and refrigeration equipment. One capacitor serves two motors. It supports the compressor and the condenser fan motor in a single unit. Technicians also call it a dual capacitor, round run capacitor, or A/C capacitor. It is a common replacement when a system struggles to start, hums, or shuts down because of a weak capacitor.

Key Features:

• Dual-section design with a common terminal. One capacitor runs both the compressor and the fan motor.
• Round case, which suits standard round-capacitor mounting brackets in many condensing units and heat pumps.
• Built for continuous-duty running of single-phase motors in air conditioning and refrigeration systems.
• Marked with capacitance (MFD) and voltage ratings for each section, so you can match the original capacitor.
• Terminals for straightforward wiring in the field.

A good run capacitor helps motors start and run efficiently, reduces strain on the compressor and fan, and helps keep the system cooling reliably. Each variant in this line is offered in its own MFD and voltage rating. Match both ratings to the original capacitor. Disconnect power and discharge the capacitor before you service it.