The MARS 11926 Start Capacitor is a high-duty motor start capacitor engineered for demanding HVACR applications requiring reliable starting torque. With a capacitance range of 540-648 Microfarads (MFD) and a dual voltage rating of 110/125Vac, this round electrolytic capacitor is a standard replacement for single-phase motors in residential and light commercial equipment. The unit is housed in a hermetically sealed, non-conductive phenolic case (black Bakelite) that provides superior protection against environmental contaminants like oil, moisture, and dirt. This MARS 11926 540-648 MFD capacitor features 1/4-inch quick-connect terminals for rapid installation and meets rigorous industry standards for performance and safety, including UL and cUL certifications. Designed to handle frequent cycling, it ensures 50/60Hz operational consistency in compressors and fan motors. Key Benefits for Technicians High Torque Delivery: Provides the essential electrical boost to overcome mechanical inertia in stalled or heavy-load compressors. Durable phenolic Housing: The rugged Bakelite construction prevents internal degradation from grease and high-humidity environments. Universal Compatibility: Standard 1-7/16-inch diameter and 3-3/8-inch height make it a drop-in replacement for the 11926 SKU and various OEM equivalents. Thermal Stability: Rated for operation from -40°C to +65°C, ensuring reliability in unconditioned mechanical spaces. Common Questions & Answers What happens if I use a 540-648 MFD capacitor instead of a lower rating? Using a capacitor within this specified range ensures the motor receives the necessary phase shift for starting. Always match the MFD and voltage ratings of the original equipment manufacturer to avoid winding overheating or premature failure. Can the MARS 11926 replace a 110V-only capacitor? Yes, the 110/125Vac rating indicates it can safely handle any supply voltage up to 125V. It is a suitable upgrade for 110V circuits common in older HVAC systems and pump motors. Is this a run capacitor or a start capacitor? This is a dedicated start capacitor. It is designed only to remain in the circuit for the few seconds required to reach operational speed before being disconnected by a centrifugal switch or potential relay. This item is not eligible for free shipping. 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.
