MARS 12751 Run Capacitor

The MARS 12751 is a standard-grade 50 MFD 440V round run capacitor engineered for demanding HVACR applications. Designed to handle the rigorous startup and operational demands of single-phase motors, this 50 microfarad capacitor is a field-proven solution for restoring system performance in residential and light commercial equipment. Whether you are addressing a capacitor failure or performing preventative maintenance, the 12751 provides the consistent capacitance required for efficient motor operation. It features a 440 Vac rating, allowing it to safely replace both 370V and 440V units. Encased in a robust aluminum housing with a high-grade physical interrupter for internal pressure relief, this round run capacitor meets strict UL and CSA safety standards. Techs on the job site will appreciate the standard 1/4-inch blade terminals and compact 2.00-inch diameter for easy fitment in tight outdoor condenser cabinets, ensuring a reliable HVAC motor capacitor replacement for your next service call.

• Universal Voltage Compatibility: Rated at 440Vac, this 50 uF capacitor is suitable for replacing and upgrading existing 370V components for increased durability.
• High Thermal Stability: Specifically designed to withstand high-ambient temperatures in outdoor condensing units without early capacitance drift.
• Safety Integrated: Includes a built-in internal pressure interrupter to disconnect the device in the event of an internal short or terminal failure.
• Reliable Performance: Maintains a tight 5% tolerance to ensure precise motor torque and efficiency, reducing wear on the compressor or fan motor.

• Can I use a 440V capacitor if the old one was 370V? Yes. A higher voltage rating on a run capacitor is a safe upgrade and provides extra protection against voltage spikes; however, you must never use a lower voltage rating than the original.
• What are the signs of a bad 50 MFD capacitor? Common symptoms include a humming condenser fan, a compressor that fails to start (hard starting), or a physically bulged ("mushroomed") top on the capacitor casing.
• Is this compatible with my specific condenser model? Match the microfarad (MFD/uF) rating exactly to your motor's nameplate requirements. The MARS 12751 fits most round-style mounting brackets with its standard 2-inch diameter.

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.