MARS 12764 Run Capacitor

The MARS 12764 is a professional-grade 30/5 mfd 370V dual run capacitor engineered for continuous duty in residential and light commercial condensing units. This round motor run capacitor provides the precise phase shift required to optimize the torque and efficiency of both the compressor (30 microfarad) and the fan motor (5 microfarad). Built with a durable aluminum case and featuring a non-PCB oil-filled design, this component ensures stable capacitance across a temperature range of -40°C to 70°C. As a standard multi-application solution, it serves as a reliable AC capacitor replacement for systems requiring 370Vac operation. The physical interrupter safety mechanism is integrated to prevent case rupture at end-of-life, meeting UL and CSA standards for field safety. For technicians, the clearly marked terminals simplify the installation of HVAC dual run capacitors during emergency service calls.

• Dual-Section Versatility: Handles both the compressor and condenser fan from a single 30/5 microfarad housing.
• Enhanced Safety: Built-in pressure-sensitive interrupter disconnects the capacitor in the event of internal failure.
• Broad Compatibility: replaces multiple OEM 370Vac round dual run capacitors in various condenser brands.
• Full Temperature Support: Rated for operation between -40°C and 70°C, maintaining performance in extreme attic or outdoor environments.
• Compact Footprint: 2.00-inch diameter and 3.13-inch case height allow for easy fitment in tight electrical control boxes.

Can I use a 440V capacitor to replace this 370V model?
Yes, technicians frequently use a 440Vac rated capacitor (like the MARS 12264) to replace a 370Vac unit as it provides a higher voltage tolerance. However, you must never replace a 440V unit with a 370V unit.

How do I identify which terminal is for the fan and which is for the compressor?
The terminals are usually marked: "C" for Common, "HERM" (Hermetic) for the 30 mfd compressor side, and "FAN" for the 5 mfd fan motor side.

Is this capacitor compatible with both 50Hz and 60Hz systems?
Yes, the MARS 12764 is designed to operate efficiently on both 50 and 60 Hertz frequencies.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.