MARS 12753 Run Capacitor

The MARS 12753 is a high-reliability 50/3 MFD 370V round dual run capacitor engineered for continuous duty in residential and commercial HVACR systems. As a veteran-grade motor run capacitor, it serves a dual-purpose role, providing the necessary phase shift to optimize the torque and efficiency of both the compressor (50 µF) and the condenser fan motor (3 µF). Built to withstand the rigors of high-demand cooling cycles, this dual run capacitor features a non-PCB, oil-filled design that ensures superior heat dissipation and dielectric strength. The aluminum casing provides a robust physical interrupter for added safety against internal pressure buildup. This unit is a direct HVAC replacement part for any system requiring a 370 VAC dual capacitor with a 50/3 microfarad rating, maintaining stable capacitance even at an elevated ambient temperature of 70°C. Contractors can rely on its UL and CSA certifications for code-compliant field repairs.

• Optimized Motor Performance: Ensures precise 50/3 µF capacitance for efficient compressor and fan motor operation.
• Durable Construction: High-grade metallized polypropylene film and oil-filled housing for industrial-level thermal management.
• Universal Compatibility: Standard round dual run capacitor form factor fits most residential condensing units.
• Safety Rated: Equipped with an internal pressure sensitive interrupter to prevent casing rupture.

Can I use a 440V capacitor to replace this 370V model?
Yes, in modern HVAC applications, a 440V capacitor is a safe upgrade for a 370V circuit, as the voltage rating indicates the maximum surge it can handle. However, you must match the 50/3 microfarad rating exactly to avoid motor overheating.

How do I identify a failing 50/3 run capacitor?
Technicians should look for a "bulged" or swollen top, leaking oil, or a motor that hums but fails to start. Testing with a multimeter should show a capacitance reading within +/- 5% of the 50 µF and 3 µF specifications.

Does this capacitor support 50Hz and 60Hz systems?
Yes, the MARS 12753 is designed to operate effectively on both 50Hz and 60Hz power frequencies, making it suitable for a wide range of regional equipment.

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.