MARS 11924 Start Capacitor

As an experienced HVAC technician, you know that a motor is only as reliable as its starting torque. The MARS 11924 Start Capacitor is a professional-grade solution for single-phase motors requiring a significant boost to overcome initial inertia. Rated for 400-480 Microfarad (MFD) and 110/125Vac, this round electrolytic capacitor is specifically engineered for high-demand HVAC capacitor replacement in residential and commercial cooling units. Whether you are dealing with a seized compressor or a blower motor that hums but won't turn, this 400-480 MFD 125V capacitor provides the necessary phase shift to get the equipment back in service. Encased in a rugged, moisture-resistant phenolic shell, the MARS 11924 meets strict industry standards for electrical integrity and heat dissipation, making it a staple for any AC repair service van. For contractors performing air conditioning troubleshooting, this 1-3/8" diameter component is the direct OEM-quality equivalent for various fractional horsepower motor applications where reliability is non-negotiable.

• High Torque Delivery: Provides a massive 400-480 MFD surge to assist motors in starting under heavy mechanical loads.
• Standardized Dimensions: Measuring 1-3/8" in diameter and approximately 2-3/4" tall, it fits most standard mounting brackets and terminal boxes.
• Industry Compatibility: Functions as a high-performance HVAC part compatible with MARS, Jard, and other major refrigeration brands.
• Durable Construction: The phenolic housing is designed to withstand the high-temperature environments typical of condensing units and rooftop packages.
• Safe Discharge Path: Built to industry specifications to ensure safe integration with potential relays or centrifugal switches for circuit cutout after startup.

What are the signs that I need to replace a start capacitor?
Common electrical symptoms include a motor that hums but fails to spin, visible bulging or leaking at the top of the capacitor, or if the unit repeatedly trips the circuit breaker upon startup.

Can I use a start capacitor with a higher MFD rating?
While a slightly higher capacitance can improve starting torque, it must stay within the motor manufacturer's tolerances. A 400-480 MFD rating is a standard range for many 110/125V motor applications, but always verify the nameplate data.

How do I test the MARS 11924?
After ensuring the power is off and the capacitor is safely discharged, use a multimeter with a capacitance setting. The reading should fall between the 400 and 480 MFD range to be considered within operational specs.

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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.