MARS 12718 Run Capacitor

When you're out on a service call and a motor won't turn over, a reliable 35 MFD 370V run capacitor like the MARS 12718 is a staple in your truck's inventory. This round motor run capacitor is engineered for continuous duty in HVACR systems, providing the phase shift necessary for efficient condenser fan motor and furnace blower operation. Built to meet rigorous industry standards, this 35 microfarad 370Vac round run capacitor features a non-PCB oil-filled design with a pressure-sensitive interrupter to ensure safe failure at end-of-life. The HVAC capacitor replacement process is streamlined by its universal 1/4-inch quick-connect terminals, allowing for rapid installation in tight control boxes. Whether you are performing an AC capacitor repair or replacing a legacy GE/Genteq unit, the MARS 12718 provides a reliable electrical bridge to restore peak system performance and maintain the power factor required by high-efficiency motors.

• Universal Compatibility: Directly replaces multiple OEM parts including GE, Genteq, and various 35 MFD 370V units.
• Industrial Durability: Housed in a rugged aluminum casing designed to withstand the high ambient temperatures of outdoor condensers.
• Enhanced Safety: Internal pressure-sensitive interrupter prevents casing rupture under electrical fault conditions.
• Precision Tolerance: Maintains a tight +/- 6% capacitance tolerance to ensure stable motor torque and RPM.
• Standardized Terminals: Equipped with quad-blade quick-connects for versatile wiring configurations in the field.

Can I use a 440V capacitor to replace this 370V 12718 model?

Yes. In HVAC applications, you can always upgrade to a higher voltage rating (e.g., using a 440V in place of a 370V), but you must never use a lower voltage rating than the original specification.

What are the symptoms of a failing 35 MFD run capacitor?

Common field indicators include a humming motor that fails to start, a bulged or leaking capacitor casing, or the motor cutting out on thermal overload due to high amperage draw.

Does the physical size of the capacitor matter if the specs match?

While the electrical specs (35 MFD, 370V) are the priority, always verify that the round physical diameter fits within the existing mounting strap or bracket inside the unit.

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.