MARS 12933 Run Capacitor

As a seasoned technician, you know that a reliable motor start and run cycle depends on high-quality components. The MARS 12933 Run Capacitor is a professional-grade 12.5 microfarad 440Vac oval run capacitor designed for continuous-duty HVAC applications. This single-section run capacitor features a robust aluminum case that ensures effective heat dissipation and structural integrity in demanding environments. Rated for 440 volts AC, it serves as a high-performance replacement for 370V and 440V systems, providing the necessary phase shift to optimize motor efficiency and torque. Its compact oval form factor and standard 1/4-inch quick-connect terminals allow for straightforward integration into tight control boxes for furnace blower motors, condenser fans, and light commercial pumps. Engineered to operate within a temperature range of -40°C to 70°C, this HVAC motor capacitor is a standard truck-stock item for ensuring system reliability and reducing expensive call-backs due to motor failure.

• Broad Compatibility: Replaces common 12.5 MFD capacitors in both 370V and 440V AC applications (MARS, JARD, and OEM equivalents).
• Compact Oval Design: Ideal for specific mounting brackets where space is restricted compared to round-style capacitors.
• Environmental Resilience: Professional-grade aluminum housing and non-PCB oil construction withstand high ambient temperatures and vibration.
• High Reliability: Designed for an operational life of 60,000 hours to support long-term motor performance.

Can I use this 440V capacitor to replace a 370V capacitor?
Yes. In HVACR applications, you can always upgrade to a higher voltage rating (e.g., replacing 370V with 440V) as long as the microfarad (MFD/uF) rating remains the same.

What are the physical dimensions of the MARS 12933?
This oval capacitor typically features a case height of approximately 2.75 inches and a width of 2.06 inches, making it a drop-in replacement for standard oval brackets.

Is the 12.5 MFD rating interchangeable with other values?
No. You must match the 12.5 microfarad rating exactly to the motor manufacturer’s specifications to ensure proper winding temperature and motor longevity.

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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.