MARS 12940 Run Capacitor

The MARS 12940 is a professional-grade 25 MFD 440V oval run capacitor engineered for high-performance motor support in HVACR systems. Designed as a universal replacement for 25 microfarad 440Vac oval run capacitors, this unit stabilizes phase shift in permanent split capacitor (PSC) motors, ensuring efficient operation of condenser fans and blower assemblies. Built with a durable, non-PCB aluminum case, the 12940 is rated for continuous duty with a thermal operating range of -40°C to +70°C. Its 440V rating allows it to safely replace older 370V units, providing improved dielectric strength and longevity in high-voltage circuits. This HVAC replacement capacitor features standard 1/4-inch male quick-connect terminals, facilitating a secure fit in space-constrained electrical enclosures. As a veteran-preferred component for AC motor run capacitor repairs, it meets rigorous industry standards for safety and performance reliability in demanding residential and light commercial environments.

• Universal Compatibility: Physical and electrical specifications allow it to replace 25 MFD capacitors in a wide range of motor applications.
• Enhanced Durability: The 440VAC rating offers a superior safety margin over 370V versions, preventing premature dielectric breakdown.
• Compact Oval Profile: Specifically sized to fit standard mounting brackets and tight motor control boxes.
• Standardized Terminals: Equipped with four-blade quick-connect terminals for flexible wiring configurations common in OEM units.

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

Yes. You can always increase the voltage rating when replacing a run capacitor, but you must never go lower than the original motor specification.

What happens if the capacitance (MFD) does not match exactly?

Using an incorrect MFD rating can lead to excessive motor heat, reduced torque, and eventual motor winding failure. Always match the microfarad rating to the motor's nameplate.

Is the 12940 suitable for both indoor and outdoor motors?

Yes, provided the motor requires a 25 MFD 370/440V single section capacitor. It is commonly used for both condenser fans and indoor blower motors.

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.