MARS 12710 Run Capacitor

The MARS 12710 is a high-performance 15 MFD 370V round run capacitor designed for continuous duty in residential and light commercial HVACR systems. As a veteran-grade motor run capacitor, this unit provides the necessary phase shift to support PSC (Permanent Split Capacitor) motors, ensuring efficient operation of blower motors and condenser fans. Built to JARD specifications, the 12710 features a non-PCB, oil-filled design that effectively dissipates heat during high-duty cycles. The round aluminum case is hermetically sealed to prevent moisture ingress, while the 1/4-inch quick-connect terminals allow for rapid field replacement. With a tolerance of +/- 5% and a frequency rating of 50/60 Hz, this HVAC replacement part is engineered to handle the back-EMF generated by start windings, protecting your equipment from premature winding failure. Whether you are servicing a furnace blower or a refrigeration unit, the MARS 12710 offers the technical reliability required for critical cooling and heating applications.

• High Dielectric Strength: Rated for 370 VAC, providing a stable voltage buffer for standard 240V residential systems.
• Universal Compatibility: The 15 Microfarad rating makes it a versatile drop-in for various OEM blower motors and condenser units.
• Enhanced Safety: Features a built-in physical interrupter to disconnect the capacitor in the event of internal pressure buildup.
• Thermal Stability: Operating temperature range of -40°C to 70°C ensures consistent capacitance in demanding mechanical rooms or outdoor environments.
• Compact Footprint: The round configuration fits most standard mounting straps and brackets found in modern air handlers.

Can I use a 440V capacitor to replace this 370V model?
Yes. In the field, you can always upgrade the voltage rating as long as the 15 MFD capacitance remains the same. A higher voltage rating typically indicates a more robust internal insulation, which can improve service life.

How do I know if this run capacitor has failed?
Standard indicators include a bulging or swollen top, oil leakage, or a motor that hums but fails to start. For precise diagnosis, use a multimeter to verify the microfarad output is within the 5% tolerance range.

Does the physical size of the round case matter?
While the electrical specs are the priority, ensure the diameter and height of the MARS 12710 align with your existing mounting bracket. If the new unit is smaller, a standard adjustable strap can secure it properly.

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.