Hartland Controls CAP-55/440R Run Capacitor

When you're out on a service call and find a dead compressor or fan motor that won't kick over, checking the run capacitor is your first move. The Hartland Controls CAP-55/440R is a heavy-duty 55 MFD round run capacitor engineered for consistent performance in demanding HVACR environments. This 55 microfarad 440V capacitor is a versatile bench staple, as the 440VAC rating allows it to safely replace 370V units, providing a higher dielectric strength and thermal headroom. As a direct replacement for CPT0939, it fits standard round mounting brackets and features universal 1/4-inch terminals for quick wiring. Built to EIA-456 standards with unpainted aluminum construction, it handles the heat of a condenser cabinet without physical degradation. Whether you are performing a capacitor replacement on a residential AC or a light commercial refrigeration unit, this HVAC motor run capacitor ensures proper phase shift and motor torque, keeping equipment running at peak efficiency even during high-load summer cycles.

Key Benefits

• Broad Compatibility: Rated at 370/440Vac, making it the correct HVAC replacement part for systems requiring either voltage level.
• Precision Tolerance: Maintains a tight +/- 3% capacitance tolerance to ensure the motor operates within the manufacturer's specified amperage range.
• Professional Grade: Tested for up to 60,000 hours of operating life, meeting rigorous technical specifications for long-term reliability.
• Safety Compliance: Manufactured in accordance with EIA-456 standards, featuring internal pressure sensitive interrupters.

Common Questions

Can I use a 440V capacitor to replace a 370V one?
Yes. You can always go up in voltage, but never down. Using this 440V unit in a 370V application provides additional protection against voltage spikes.

How do I know if this round run capacitor is failing?
Look for physical signs like a bulged top or leaking oil. Technically, you should test it with a multimeter; if the microfarad (MFD) reading drops more than 6% below 55, it?s time to swap it out.

Is the CAP-55/440R interchangeable with an oval capacitor?
Electrically, yes, as long as the 55 MFD and 440VAC ratings match. However, you may need a different mounting strap if the original was an oval-style housing.

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.