MARS 12755 Run Capacitor

The MARS 12755 is a high-performance 50/5 MFD 370V round dual run capacitor engineered for demanding HVACR service environments. This dual run capacitor features a heavy-duty aluminum case and facilitates the simultaneous operation of both the compressor and the condenser fan motor. Designed to withstand extreme ambient conditions, it operates within a temperature range of -40°C to +70°C and meets EIA-456-A standards for long-term reliability. The MARS 12755 is a standard-sized HVAC replacement part, measuring approximately 2 inches in diameter with a case height of 2.75 inches. Its 370V rating provides stable voltage regulation for 50/60 Hz systems, ensuring efficient starting torque and motor performance. As a non-PCB, physical interrupter-equipped component, this 50/5 microfarad capacitor is a reliable choice for professional contractors seeking an exact-fit solution for residential and light commercial air conditioning units.

• Dual-Section Functionality: Integrated 50/5 MFD design supports both the compressor (HERM) and fan (FAN) circuits in a single footprint.
• Enhanced Safety: Built-in pressure-sensitive interrupter and non-PCB oil construction meet rigorous UL and CSA safety requirements.
• Wide Compatibility: Standard 2-inch diameter round configuration fits most OEM brackets for Lennox, Carrier, and Goodman systems.
• Industrial Durability: Rated for 60,000 hours of operational life, maintaining capacitance tolerance within +/- 5% under load.
• Environmental Resilience: Encased in a corrosion-resistant aluminum housing to prevent failure in high-humidity outdoor condensers.

Can I use a 440V capacitor to replace this 370V 12755 model?
Yes, a 440V rated capacitor is a suitable upgrade for a 370V system as it provides a higher insulation threshold, whereas you should never replace a 440V unit with a lower-rated 370V model.

What are the terminal designations for this dual capacitor?
The unit features standard quick-connect terminals labeled "C" for Common, "HERM" for the compressor, and "FAN" for the condenser fan motor.

How do I know if my 50/5 MFD capacitor has failed?
Common indicators include a bulged top, fluid leakage, or the motor humming without starting. Using a multimeter to verify the microfarad reading is the recommended method for confirmation.

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.