MARS 11964 Start Capacitor

The MARS 11964 Start Capacitor is a fundamental component for field technicians requiring high-torque motor initiation in demanding HVACR applications. This 130-156 microfarad (MFD) unit is engineered with a 330Vac rating to handle the significant voltage spikes associated with compressor and blower motor startup. Built with a hermetically sealed, round black bakelite case, this dry electrolytic capacitor is resistant to oil, moisture, and debris, ensuring consistent dielectric strength in mechanical rooms and outdoor units. The round start capacitor design facilitates a drop-in replacement for standard 1-3/4" diameter mounting brackets. By providing the necessary phase shift for single-phase motors, the JARD 11964 ensures the rotor reaches 75% of synchronous speed rapidly, reducing the duration of high inrush current and preventing thermal overload. This HVAC motor start capacitor is the professional choice for rectifying hard-start issues in refrigeration and air conditioning systems.

Key Benefits

• High-Torque Performance: Delivers the necessary 130-156 MFD capacitance to overcome high-load starting resistance in compressors.
• Environmental Protection: The bakelite housing protects internal components from grease and high humidity.
• Voltage Stability: Rated for 330 Volts, making it a robust upgrade over lower-voltage 250V units for industrial durability.
• Universal Compatibility: Standard 1/4" quick-connect terminals allow for fast integration into existing HVACR motor circuits.

Common Questions

• Can I use a 330V capacitor if my original was 250V? Yes, you can always increase voltage ratings as long as the microfarad range remains consistent with the motor nameplate.
• What causes a start capacitor to fail? Excessive heat, rapid cycling, or a faulty potential relay that keeps the capacitor energized too long are primary causes of failure.
• Is a bleed-off resistor required? While not always factory-installed, adding a resistor is recommended to discharge residual voltage and protect the switching relay contacts.

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.