MARS 11968 Start Capacitor

The MARS 11968 is a high-performance 189-227 MFD 330V electrolytic start capacitor engineered for demanding industrial and commercial HVACR applications. As a veteran-grade motor start capacitor, this unit provides the necessary torque boost to initiate compressor and motor rotation in high-head pressure environments. It features a rugged, hermetically sealed black bakelite case, ensuring the internal components remain protected from oil, grease, moisture, and high-ambient heat—factors that typically lead to premature failure in standard electrolytic units.

Designed with a round start capacitor form factor, the MARS 11968 measures approximately 1-13/16 inches in diameter and 4-3/8 inches in height, making it a versatile HVAC replacement part for a wide array of single-phase motors. The dual 1/4-inch quick-connect terminals are constructed to withstand increased thermal loads, maintaining electrical integrity during frequent start cycles. Whether you are servicing a heat pump, central air conditioner, or refrigeration system, this 330VAC start capacitor delivers the reliable capacitance needed for efficient motor starting.

• Hermetically Sealed Bakelite Housing: Prevents contamination from environmental factors and enhances thermal dissipation.
• Industry-Standard 189-227 Microfarad Range: Provides consistent starting torque for medium to large tonnage compressors.
• Robust Voltage Rating: Rated for 330VAC applications, offering significant headroom over lower-voltage alternatives.
• Reliable Terminal Construction: Designed to minimize heat generation at the point of connection under severe humid conditions.
• Universal Round Configuration: Fits most standard mounting brackets in diverse mechanical equipment.

What happens if I use a start capacitor with the wrong microfarad rating?
Using a rating lower than 189-227 MFD may result in insufficient torque, causing the motor to hum or fail to start. A rating that is too high can lead to excessive winding heat or damage to the centrifugal switch/relay.

Can the MARS 11968 replace a 250V capacitor?
Yes, you can safely use a 330V capacitor to replace a 250V unit, as long as the capacitance range (MFD) matches the motor manufacturer’s specifications. Higher voltage ratings provide increased durability against voltage spikes.

What are the signs that this start capacitor needs replacement?
Common indicators include a bulging bakelite case, leaking electrolyte, or a compressor that struggles to turn over before the thermal overload trips. Always verify with a capacitance tester during preventive maintenance.

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.