MARS 12788 Run Capacitor

The MARS 12788 is a professional-grade 45/5 MFD 440V round dual run capacitor engineered for demanding HVACR applications. As a veteran-preferred choice for AC capacitor replacement, this dual-section component provides the necessary phase shift to optimize the torque and efficiency of both compressor and fan motors. Its 440VAC rating ensures robust performance in systems originally specified for 370V or 440V, offering superior dielectric strength and thermal stability compared to standard economy-grade alternatives. Built with an aluminum case and 1/4-inch male quick-connect terminals, the JARD 12788 features a physical pressure-sensitive interrupter for circuit safety and a non-PCB, oil-filled design that manages heat dissipation during continuous duty cycles. This HVAC dual run capacitor is the go-to solution for technicians requiring a reliable 45+5 microfarad 440vac part to restore high-side system pressure and air handler airflow in residential and light commercial units.

• Enhanced Compatibility: The 440V rating allows this round dual run capacitor to safely replace 370V units, providing increased voltage overhead.
• Industrial Durability: Constructed with a corrosion-resistant aluminum shell and high-grade dielectric oil for operation in temperatures from -40°C to 70°C.
• Safety Integration: Features an internal physical interrupter to disconnect the capacitor at the end of its service life, preventing case rupture.
• Optimized Motor Performance: Ensures precise 45+5 uF capacitance for peak efficiency in condenser fan and compressor startup/run cycles.

Can I use a 440V MARS 12788 to replace a 370V 45/5 MFD capacitor?
Yes. A higher voltage rating is a suitable upgrade, as it indicates the capacitor's ability to withstand higher electrical stress without degrading the capacitance value.

What are the terminal markings for the 12788 model?
This capacitor uses industry-standard markings: 'C' for Common, 'HERM' for the compressor (45 MFD), and 'FAN' for the condenser fan motor (5 MFD).

Is the MARS 12788 compatible with 50Hz and 60Hz systems?
Yes, this component is designed for 50/60 Hz applications, making it versatile for various geographic power grids and equipment specifications.

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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.