MARS 12768 Run Capacitor

The MARS 12768 Run Capacitor is a industry-standard 40/7.5 MFD 370V round dual run capacitor designed for demanding condenser and compressor applications. This dual motor run capacitor features a shared common terminal to service both the compressor (40 microfarads) and the condenser fan motor (7.5 microfarads) within a single, space-optimized housing. Engineered with high-grade metallized polypropylene film, the MARS 12768 provides reliable phase-shift performance and motor torque stability across 50/60 Hz cycles. Its non-PCB, oil-filled construction includes an integrated physical interrupter for safety in the event of an internal fault. As a veteran-preferred HVAC replacement part, it is rated for 370VAC, making it a drop-in 370 volt capacitor solution for systems requiring precise capacitance tolerances. The round dual run capacitor profile ensures compatibility with standard mounting brackets, while the standard 1/4-inch male quick-connect terminals allow for fast, secure field wiring to the HERM, FAN, and C terminals.

Key Benefits:

• Provides precise 40/7.5 MFD capacitance to maintain optimal motor efficiency and reduce winding heat.
• Features 370V protection with advanced metallized film technology for long-term dielectric stability.
• Compact round dual run capacitor footprint fits most standard HVAC residential and commercial enclosures.
• Built as a non-PCB, environmentally friendly component with a safe internal pressure interrupter.
• Universal compatibility allows it to serve as a direct HVAC replacement part for diverse dual-section motor setups.

Common Questions:

Can I use a 440V capacitor to replace this 370V model?
Yes, you can upgrade to a higher voltage rating (like 440V) as long as the 40/7.5 MFD rating remains the same. However, you must never down-rate; a 370V system requires at least a 370V rated capacitor.

How do I identify a failing MARS 12768?
Check for physical bulging at the top of the canister, oil leakage, or "weak" motor starting. Using a multimeter with a capacitance setting, verify the reading between the Common and HERM/FAN terminals stays within the specified tolerance.

Does the orientation of the round capacitor matter during installation?
Physical orientation does not affect electrical performance; however, Ensure the 40/7.5 MFD 370V round capacitor is securely strapped to prevent vibration damage and that terminals are protected from moisture and debris.

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.