Trane CPT0657 Run Capacitor

When you're out on a service call and find a weak Trane CPT0657 Run Capacitor, you need an exact OEM replacement to maintain the system’s phase angle and motor efficiency. This 50/12.5 microfarad 440Vac round dual run capacitor is engineered specifically for Trane and American Standard condensing units. It handles the high-torque demands of the compressor via the 50 MFD terminal while simultaneously managing the 12.5 MFD outdoor fan motor. Built with high-grade metallized polypropylene film and a patented pressure sensitive interrupter (PSI), it is designed for maximum reliability under extreme thermal stress. This HVAC dual capacitor operates effectively at both 370V and 440V, providing a robust buffer against voltage spikes that often kill lower-rated components. As a vet, you know that keeping the capacitance tolerance within +/- 5% is critical for preventing winding overheating. Swap this in to restore proper LRA (Locked Rotor Amps) support and ensure the hermetic compressor pulls smooth RLA (Rated Load Amps).

• Dual-Action Performance: Provides 50 MFD for the compressor and 12.5 MFD for the fan motor in a single space-saving round canister.
• High-Voltage Tolerance: Rated for 440Vac, making it a superior, long-lasting replacement for units originally requiring 370Vac.
• Safety Integrated: Includes an internal pressure sensitive interrupter (PSI) to disconnect the capacitor safely in the event of an internal failure.
• OEM Compatibility: Authentic Trane replacement part ensures correct fitment and lead alignment for American Standard HVAC systems.

• Can I use this to replace a 370V capacitor? Yes, you can always go up in voltage; the 440V rating provides more insulation strength and durability than a 370V equivalent.
• What does the 'Dual' rating mean? It means this single component contains two separate capacitors, sharing a common (C) terminal to power both the compressor (Herm) and the fan motor (Fan).
• What happens if the 12.5 MFD side fails? If the fan side drops below tolerance, the condenser fan will struggle to start or run at the correct RPM, leading to high head pressure and eventual compressor lockout.

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.