Copeland 914-0008-51 Start Capacitor

The Copeland 914-0008-51 Start Capacitor is a high-torque electrical component engineered for single-phase compressor motor starting applications. Rated at 145-174 microfarads and 220Vac, this round start capacitor provides the necessary phase shift to achieve critical starting torque in commercial refrigeration and HVAC systems. Built by Emerson, this heavy-duty motor capacitor features a moisture and oil-resistant phenolic resin housing to withstand harsh mechanical room environments. Integrated with a internal bleed resistor, it ensures rapid discharge between cycles, preventing potential relay contact pitting and protecting the overall health of the compressor motor. When performing field replacements, ensure the capacitance rating and voltage precisely match the OEM specifications on the motor nameplate to maintain proper starting characteristics and avoid drawing excessive current during the startup phase.

Key Benefits

• Optimized Starting Torque: Provides the high-current surge required to break locked rotor amperage (LRA) for reliable compressor ignition.
• Internal Bleed Resistor: Extends the life of potential relays by safely depleting stored energy after the motor reaches operating speed.
• Universal Round Design: Facilitates easy integration into standard mounting brackets for Copeland refrigeration units.
• Rugged Durability: Constructed with non-polarized electrolytic materials suitable for intermittent duty in industrial HVACR applications.

Common Questions

• Can I use a higher MFD rating if my current 145-174 MFD capacitor is unavailable? It is critical to stay within the 145-174 microfarad range; an oversized capacitor can lead to winding overheating, while an undersized one may fail to start the motor under load.
• Is this compatible with 110V or 440V systems? Negative. This unit is specifically rated for 220V AC. Using it in higher voltage systems will lead to immediate dielectric failure.
• Why does this capacitor include a factory-installed resistor? The resistor is designed to bleed off residual voltage, preventing arcing at the start relay and ensuring consistent performance during short-cycling.

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.