MARS 11915 Start Capacitor

The MARS 11915 Start Capacitor is a high-performance 189-227 MFD motor start capacitor designed for demanding HVAC motor starting applications. Rated for 110/125V AC, this round electrolytic component provides the high torque necessary to overcome initial inertia in compressors and fan motors. Encased in a hermetically sealed, moisture-resistant Bakelite case, the 11915 is engineered to withstand harsh environments containing oil, dirt, and grease. With a compact physical footprint—measuring approximately 1-7/16 inches in diameter and 2.75 inches in height—this JARD 11915 replacement capacitor fits easily into tight control boxes for general purpose motor maintenance. Featuring dual quick-connect terminals and a broad operating temperature range from -40°C to +65°C, it ensures reliable 50/60 Hz frequency operation across diverse residential and light commercial equipment. This phenolic case start capacitor is a standard trade choice for technicians requiring a durable 189-227 microfarad 125V solution to restore system efficiency immediately.

Key Benefits for Technicians

• High Torque Output: Optimized 189-227 microfarad range provides the precise electrical boost needed for rapid motor ignition.
• Environmental Protection: Hermetically sealed Bakelite housing prevents internal degradation from exposure to oil and humidity.
• Universal Fit: Standardized round dimensions ensure compatibility with most HVAC start capacitor mounting brackets.
• Reliable Terminations: Standard 1/4 inch dual terminals allow for fast, secure wiring during field service.

Common Questions

What happens if the capacitance range is slightly different?
Using a 189-227 MFD capacitor ensures your motor reaches the required synchronous speed quickly. Deviating significantly from the manufacturer's specified microfarad rating can lead to excessive winding heat or failed starts.

How do I check if my MARS 11915 has failed?
Inspect the phenolic case for bulging, leaks, or burn marks at the terminals. Use a multimeter with a capacitance setting to verify the reading falls within the 189-227 uF tolerance; if it is open or below range, the motor will likely hum without turning.

Can I use this for both 110V and 125V systems?
Yes, the 110/125Vac rating is designed for standard 120V line voltage applications, providing the necessary dielectric strength to handle voltage peaks during the start cycle.

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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.