MARS 12757 Run Capacitor

The MARS 12757 50/10 MFD 370V Round Dual Run Capacitor is a high-performance electrical component designed for direct integration into residential and light commercial HVAC systems. This dual run capacitor features a combined capacity of 50 microfarads for the compressor circuit and 10 microfarads for the fan motor, allowing for a compact single-canister footprint. Engineered for continuous duty, it stabilizes the electrical phase shift required for PSC motors in condensers and heat pumps, ensuring reliable start-up and high operational efficiency. With a 370 VAC rating and a hermetically sealed aluminum housing, the MARS 12757 provides excellent thermal dissipation and resists environmental degradation in high-ambient outdoor units. This specific HVAC motor capacitor is physical-size compatible with standard mounting brackets, making it a reliable choice for field replacements where matching strict microfarad and voltage tolerances is critical for motor longevity.

• Dual-Value Configuration: Consolidates 50 MFD and 10 MFD requirements into a single round dual run capacitor to save space in the control box.
• Industrial Durability: The hermetically sealed aluminum case protects internal components from moisture and debris in harsh AC condenser environments.
• Direct Compatibility: Standard terminal layout allows for quick reconnection of compressor and fan leads during field service.
• Professional Reliability: Built to meet rigorous electrical standards for steady-state motor performance and reduced heat generation.

• Can I use a 440V capacitor to replace this 370V 12757 model? Yes, technicians often use 440V capacitors as a heavy-duty upgrade for 370V units, provided the 50/10 MFD ratings match exactly.
• What are the signs that my MARS 12757 needs replacement? Look for physical bulging of the canister top, internal fluid leaks, or an outdoor fan motor that hums but refuses to spin.
• Does physical size matter for these round capacitors? While capacitance and voltage are primary, ensure the diameter of the MARS 12757 fits your existing bracket to avoid vibration issues during operation.

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.