MARS 12950 Run Capacitor

The MARS 12950 is a heavy-duty 55 MFD 440V oval motor run capacitor designed for continuous-duty HVACR applications. As a 55 microfarad 440Vac oval run capacitor, this component is engineered to maintain the necessary phase shift for single-phase induction motors, ensuring optimal torque and efficiency for compressor motors and large blower units. The MARS 12950 features a dual-voltage rating of 370/440 VAC, providing technical flexibility for field service across various equipment brands without derating performance.

Constructed with a durable aluminum case, this HVAC capacitor offers superior heat dissipation and environmental protection, vital for high-ambient rooftop or condenser installations. The non-PCB oil-filled dielectric system ensures long-term stability and prevents internal breakdown under thermal stress. For technicians, the standard 1/4-inch quick-connect terminals and compact oval form factor allow for seamless integration into standard mounting brackets during motor run capacitor replacement.

Key Benefits

• Optimized Motor Efficiency: Provides a precise 55 MFD capacitance to minimize amp draw and extend the operating life of PSC motors.
• High Voltage Versatility: The 440V rating allows it to replace both 370V and 440V capacitors safely, reducing inventory for contractors.
• Robust Physical Design: Housed in a corrosion-resistant oval aluminum canister for reliable performance in harsh outdoor environments.
• Industry Standard Compatibility: Direct replacement for common HVAC capacitor 55 MFD applications in residential and commercial cooling systems.

Common Questions

• Can I use an oval capacitor if the original was round? Yes, provided the MFD and voltage ratings match and you have a compatible oval mounting bracket or strap.
• What happens if the capacitance drops below 55 MFD? If the multimeter reading falls more than 10% below the rated 55 microfarads, the motor will experience increased heat and reduced efficiency, leading to potential winding failure.
• Is 440V necessary if my system is 230V? A higher voltage rating like 440Vac is always acceptable for lower voltage systems as it provides a higher safety margin against voltage spikes.

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.