MARS 12763 Run Capacitor

As a seasoned technician, you know that a reliable motor start and run cycle are non-negotiable for system longevity. The MARS 12763 Run Capacitor is a 30/4 MFD 370V Round Run Capacitor designed for precision in dual-purpose applications. This dual run capacitor provides the necessary phase shift for both the compressor (30 microfarad) and the fan motor (4 microfarad), ensuring synchronized performance in residential and light commercial HVAC systems. Rated for 370 VAC and capable of operating across 50/60Hz frequencies, this unit serves as a high-performance replacement for GE Genteq C3304R and Supco CD30+4370R models. Engineered with a physical pressure-sensitive interrupter for advanced safety and a non-PCB oil-filled construction, it meets EIA-456A standards for up to 60,000 hours of operational life. The 1/4-inch male quick-connect terminals and compact round dual run capacitor housing make it a straightforward drop-in solution for contractors focused on restoring peak efficiency and reducing amperage draw.

Key Benefits

• Dual-Terminal Versatility: Specifically tuned with a 30 + 4 uF rating to support both the compressor and condenser fan simultaneously.
• Reliable Heat Dissipation: Constructed to operate in temperatures ranging from -40°C to +70°C, preventing common failure points in high-ambient environments.
• OEM Compatibility: A direct technical substitute for several major brands, including JARD 12763, 97F9836, and Mars2 series components.
• Safety-First Design: Features an integrated internal pressure interrupter that disconnects the capacitor at the end of its lifecycle to prevent case rupture.
• Enhanced Efficiency: Tight +/- 6% capacitance tolerance ensures the motor maintains the correct torque, reducing energy consumption and mechanical wear.

Common Questions

Can I use a 440V capacitor to replace this 370V model?
Yes. In HVAC electrical standards, you can always step up in voltage. A 440V capacitor will handle the 370V requirements safely, but you should never undersize the voltage rating below the equipment's original specifications.

What are the symptoms of a failing 30/4 MFD capacitor?
Technicians typically look for a "bulged" top, an audible humming from the condenser without the fan spinning, or the compressor struggling to turn over. High amperage on the start winding is also a clear indicator of a degraded AC capacitor.

Does this capacitor support 50Hz and 60Hz systems?
The MARS 12763 is rated for dual-frequency operation, making it suitable for standard North American grids as well as international applications requiring a 30/4 MFD 370V rating.

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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.