Mars 12218 Single Run Capacitor 35 Mfd 370V Round

Product Description

The MARS 12218 is a single-value round run capacitor rated at 35 microfarads (MFD) and 370 volts AC. It provides continuous capacitance to support motor starting torque and steady-state operation in fan motors and compressors. Run capacitors like this one remain energized throughout the full motor run cycle, stabilizing voltage and improving motor efficiency. The round case measures 4.6 inches in length with a 1.9-inch width and 1.9-inch height, and a case height of 3.75 inches. It is rated for both 50 and 60 Hz applications, making it suitable for a wide range of HVAC equipment. Licensed HVAC technicians and refrigeration mechanics are the primary installers of this component.

This capacitor is designed for use in residential and light commercial HVAC systems, including central air conditioning units and refrigeration equipment. It supports fan motors and compressors where a single-value run capacitor is specified. The round form factor fits standard capacitor brackets and is a common replacement style across many system configurations. It operates at the standard 370 VAC rating found in a broad range of installed residential condensing units and air handlers.

Key Features

• 35 MFD single capacitance value for fan motor and compressor support
• 370 VAC rating compatible with standard residential HVAC voltage requirements
• Dual frequency rating: 50/60 Hz
• Round case design fits standard capacitor mounting brackets
• Compact form factor: 4.6 inches length, 1.9 inches width and height

Compatibility

Designed as an OEM-style replacement single run capacitor for residential and light commercial air conditioning and refrigeration systems requiring a 35 MFD, 370 VAC round capacitor.

Installation Notes

Run capacitor replacement is performed by licensed HVAC technicians. Always disconnect and lock out power to the unit before handling capacitors, as they retain a charge even after power is removed — discharge the capacitor safely before making contact. Verify that the MFD rating and voltage rating of the replacement match the equipment nameplate specifications exactly before installation. Follow all applicable local codes and manufacturer service instructions.