MARS 11962 Start Capacitor

The MARS 11962 Start Capacitor is a high-duty electrical component designed to provide the essential starting torque required for single-phase motors and HVAC compressor startup. Rated for 88-108 Microfarads (MFD) at 330Vac, this round electrolytic capacitor is housed in a hermetically sealed, non-conductive Bakelite case. This robust phenolic construction protects the internal foils from oil, moisture, and dirt, ensuring stability in demanding mechanical environments. Engineered for 50/60 Hz applications, the 11962 is a standard motor start capacitor replacement for units experiencing locked rotor amps (LRA) issues or "humming" during the start cycle. Its compact 1.81-inch diameter and 3.38-inch height allow for seamless integration into existing control boxes. When replacing a failed 330V start capacitor, professional technicians prioritize this model for its reliable dielectric strength and ability to assist compressors in overcoming high head pressures, particularly in systems utilizing non-bleed TXVs.

Key Benefits

• Optimized Torque: Delivers a consistent 88-108 MFD range to significantly reduce startup time and electrical stress on motor windings.
• Environmental Protection: The phenolic case provides superior resistance to grease and humidity compared to standard plastic housings.
• Universal Compatibility: Operates at 330Vac, making it a safe round start capacitor replacement for various 125V and 250V rated systems.
• Industrial Standard: Features dual quick-connect terminals for fast, secure wiring in residential and commercial condensing units.

Common Questions

• How do I know if my MARS 11962 has failed? Look for a bulging top membrane, oil leakage near the terminals, or a compressor that hums but fails to turn over. Always verify with a multimeter set to the capacitance (uF) scale.
• Can I use a 330V capacitor if my original was 250V? Yes. In capacitor replacement, the voltage rating must be equal to or higher than the original; a 330V rating provides increased dielectric safety.
• Is the 88-108 MFD range critical? Yes. Sizing within the manufacturer’s ±10% tolerance is essential to prevent motor overheating and ensure the start winding is properly energized.

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.