65 uF MFD 370/440 VAC Round Run Start Capacitor CBB65 - Fits AC Motor Run, Fan Start, Heat Pump
BlueStars 65 uF 370/440 VAC round run capacitor for AC motors and heat pumps.
Step-by-step installation guide for 65 uF 370/440 VAC round run capacitor in AC motor and heat pump systems.
Infographic showing two 65 uF 370/440 VAC round run capacitors and signs indicating when to replace an AC capacitor.
65 uF 370/440 VAC round run capacitor for AC and heat pump systems shown with a couple relaxing in a living room.
BlueStars 65 uF 370/440 VAC round run capacitor with dimensions and certification labels shown.
Specification chart for 65 uF 370/440 VAC CBB65 round run capacitor with technical details.
Top view of 65 uF 370/440 VAC round run capacitor showing 2-terminal layout and common, fan, and compressor labels.
BlueStars 65 uF 370/440 VAC round run capacitor with aluminum case and metalized film construction details.
Infographic showing 65 uF 370/440 VAC round run capacitor specifications and selection guide.
Close-up of a 65 uF 370/440 VAC round run capacitor for AC motor and heat pump repair.
Technician repairing an AC unit with a 65 uF 370/440 VAC round run capacitor shown in the foreground.
Infographic showing 65uF capacitor applications for air conditioners, refrigerators, heat pumps, and compressors.
BlueStars 65 uF 370/440 VAC round run capacitor for AC motors and heat pumps.
Step-by-step installation guide for 65 uF 370/440 VAC round run capacitor in AC motor and heat pump systems.
Infographic showing two 65 uF 370/440 VAC round run capacitors and signs indicating when to replace an AC capacitor.
65 uF 370/440 VAC round run capacitor for AC and heat pump systems shown with a couple relaxing in a living room.
BlueStars 65 uF 370/440 VAC round run capacitor with dimensions and certification labels shown.
Specification chart for 65 uF 370/440 VAC CBB65 round run capacitor with technical details.
Top view of 65 uF 370/440 VAC round run capacitor showing 2-terminal layout and common, fan, and compressor labels.
BlueStars 65 uF 370/440 VAC round run capacitor with aluminum case and metalized film construction details.
Infographic showing 65 uF 370/440 VAC round run capacitor specifications and selection guide.
Close-up of a 65 uF 370/440 VAC round run capacitor for AC motor and heat pump repair.
Technician repairing an AC unit with a 65 uF 370/440 VAC round run capacitor shown in the foreground.
Infographic showing 65uF capacitor applications for air conditioners, refrigerators, heat pumps, and compressors.
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65 uF MFD 370/440 VAC Round Run Start Capacitor CBB65 - Fits AC Motor Run, Fan Start, Heat Pump

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CBB65 65 uF/MFD 370-440VAC Round Run Start Capacitor

Key Features

  • Model: CBB65
  • Capacitance: 65 uF/MFD
  • Capacitance Tolerance: ±5%
  • Voltage Rating: 370/440 VAC
  • Frequency: 50/60 Hz
  • Shape: Round
  • Construction: Aluminum case, oil-filled
  • Operating Temperature: -25°C to 85°C
  • Safety: No PCBs, 10,000 AFC fault current protection
  • Terminals: Multi-spade quick-connect

Replaces / Cross-Reference Part Numbers

  • Replaces any single run round capacitor with matching 65 MFD capacitance and 370V or 440V specifications.
  • Verify physical dimensions for proper fit.

Compatibility & Fitment

  • Used for single-phase motor start and run applications.
  • Commonly found in AC units, heat pumps, compressors, and condenser fan motors.
  • Compatible with systems requiring a 370 VAC or 440 VAC rated capacitor. A 440V capacitor can replace a 370V capacitor, but not vice-versa.

When to Replace

  • Motor hums but fails to start or starts slowly.
  • Fan blades do not spin or turn at a reduced speed.
  • Compressor fails to start.
  • Visible signs of damage such as swelling, bulging, or fluid leakage from the capacitor case.
  • Capacitance measures outside the ±5% tolerance range when tested with a multimeter.

Installation Tips

  • Disconnect all electrical power to the unit before performing service.
  • Safely discharge the existing capacitor by shorting the terminals with an insulated-handle screwdriver.
  • Note the wire placement on the old capacitor's terminals before disconnecting.
  • Ensure the new capacitor's voltage and MFD ratings match the component being replaced.
  • Professional installation is recommended if you are not familiar with electrical service procedures.
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  • Step 1

    Step 1

    Turn off the power and locate the capacitor
  • Step 2

    Step 2

    Discharge any stored electricity by shorting the terminals
  • Step 3

    Step 3

    Take a photo or note how the wires connect. Disconnect wires & install the new capacitor.
  • Step 4

    Step 4

    Reassemble and test

FAQ

The most common signs of a failing capacitor include a humming or buzzing sound from your AC unit, the fan failing to start on its own, or the motor struggling to reach full speed. If the top of the capacitor appears domed or swollen, or if you notice a burnt smell or leaking oil, it has failed and requires immediate replacement.
Yes. A capacitor rated for 440 VAC is fully compatible with systems requiring 370 VAC. The voltage rating indicates the maximum voltage the capacitor can handle; using a higher-rated capacitor provides an extra safety margin and will not damage your motor.
This 65 uF capacitor is designed for use in a wide range of motor-driven equipment, including residential and commercial air conditioning units, heat pumps, pool pumps, and various AC motor run or fan start applications.
You will typically need a screwdriver to remove the access panel, a pair of insulated needle-nose pliers to disconnect the terminals, and a multimeter capable of measuring capacitance to verify the new part. Always ensure the power to the unit is completely disconnected at the breaker before beginning.
Before removing the old capacitor, always discharge it by touching the terminals with an insulated screwdriver to prevent electrical shock, even if the power is off. It is also helpful to take a photo of the existing wiring connections to ensure the new capacitor is wired exactly the same way.
Capacitors are sensitive to heat and voltage spikes. Common causes of premature failure include extreme ambient temperatures, poor airflow around the outdoor condenser unit, or frequent power surges. Keeping your condenser coils clean and free of debris helps the motor run more efficiently, which reduces the thermal stress on the capacitor.