80 uF MFD ±5% 370/440 VAC 50/60 Hz CBB65 Round Run Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump

80 uF MFD 370V/440V VAC CBB65 Round Motor Run Capacitor

Key Features

• Dual Voltage Rated: Specifically engineered to operate on both 370VAC and 440VAC systems, providing a versatile replacement solution for a wide range of residential and commercial HVAC units.
• High-Capacitance Performance: Features an 80 microfarad (uF) rating with a tight ±5% tolerance, ensuring your compressor or motor receives the precise electrical "boost" needed for efficient start-up and running.
• Internal Pressure Safety Switch: Equipped with a built-in safety disconnector that permanently interrupts the circuit if internal pressure builds, preventing the capacitor from bursting in extreme heat or overload conditions.
• Non-PCB Oil Filled: Manufactured using environmentally friendly, non-toxic oil that provides superior heat dissipation and electrical insulation, significantly extending the service life of the component.
• Heavy-Duty Aluminum Shell: Housed in a corrosion-resistant, hermetically sealed aluminum cylinder designed to withstand the vibration and temperature fluctuations of outdoor condenser units.

Replaces / Cross-Reference Part Numbers

• Primary Specification: 80 uF / 80 MFD at 440V/370V.
• Verified Cross-References: CBB65, CBB65B, 97F9850, HC98KA081, P291-8004RS.
• Industry Standard Codes: 10022, CAP-80-440R, Mars 12022, JARD 12722.
• General Specification: Round Run Capacitor, 80 MFD, 370/440 Volts, 50/60 Hz, Operating Temp -40°C to +70°C.

Compatibility & Fitment

This high-capacity run capacitor is a standard component for large-tonnage HVAC systems and heavy-duty motors. Key compatible applications include:

• Air Conditioning Units: Fits many 4-ton and 5-ton central AC condensers from brands like Goodman, Amana, Carrier, Bryant, and Rheem.
• Heat Pumps: Compatible with residential heat pump systems requiring a dedicated 80 uF start/run boost for the compressor.
• Electric Motors: Suitable for use in large industrial fans, blowers, and pump motors that specify an 80 MFD 370/440V capacitor.
• Note: Always verify that the MFD (80) matches your old capacitor exactly. You can always use a higher voltage (440V to replace a 370V), but never a lower voltage.

When to Replace

• "Bulged" or Swollen Top: If the top of the aluminum cylinder is domed or mushroomed, the internal safety switch has tripped and the capacitor is dead.
• Compressor Won't Start: If you hear a "humming" or "buzzing" sound from your outdoor unit but the fan or compressor won't kick on, the capacitor likely lacks the charge to start the motor.
• Leaking Oil: Any visible fluid leaking from the terminals indicates the internal seal has failed and the part should be replaced immediately.
• Intermittent Cooling: A failing capacitor can cause the compressor to overheat and trip the internal thermal overload, leading to inconsistent cooling inside the home.

Installation Tips

• Safety First: CRITICAL: Turn off the power at the breaker and the disconnect box. **DISCHARGE** the old capacitor by shorting the terminals with an insulated screwdriver before touching it—capacitors can hold a lethal charge even with the power off.
• Terminal Mapping: PRO TIP: Before removing the wires from the old unit, take a photo. If your capacitor has three terminals, they are usually labeled **C** (Common), **HERM** (Compressor), and **FAN**.
• Secure Mounting: Use a metal mounting strap to ensure the capacitor is held tightly against the unit wall. Excessive vibration can lead to premature failure of the internal connections.
• Check the Contactor: While you're replacing the capacitor, inspect the points on your AC contactor. If they are pitted or "charred," replacing them now will prevent the new capacitor from being stressed by poor electrical contact.