20 uF MFD ±5% 370/440 VAC CBB65 Multi-Purpose Motor Run Round Capacitor 10000AFC - For Air Conditioner, Heat Pump
20 uF 370/440 VAC CBB65 round motor run capacitor with dual terminal top view.
Four-step installation guide for 20 uF 370/440 VAC CBB65 motor run capacitor in an air conditioner unit.
Infographic showing two 20 uF 370/440 VAC CBB65 motor run capacitors and signs indicating when to replace an AC capacitor.
BlueStars 20 uF 370/440 VAC CBB65 round motor run capacitor for air conditioner and heat pump systems.
BlueStars 20 uF 370/440 VAC CBB65 round motor run capacitor with dimensions and certification labels.
Infographic showing technical specifications for a 20 uF 370/440 VAC CBB65 motor run capacitor.
Top view of 20 uF 370/440 VAC motor run capacitor showing 2-terminal layout and C, F, and H/HERM connection labels.
Infographic showing 20 uF 370/440 VAC CBB65 round motor run capacitor with aluminum case and metalized film details.
Infographic guide for choosing a 20 uF 370/440 VAC CBB65 motor run capacitor for air conditioners and heat pumps.
Infographic showing 20 uF motor run capacitor applications for air conditioners, refrigerators, heat pumps, and compressors.
Technician installing a 20 uF 370/440 VAC CBB65 motor run capacitor into an air conditioner unit.
BlueStars 20 uF 370/440 VAC CBB65 motor run capacitor shown in a promotional graphic with an HVAC technician.
20 uF 370/440 VAC CBB65 round motor run capacitor with dual terminal top view.
Four-step installation guide for 20 uF 370/440 VAC CBB65 motor run capacitor in an air conditioner unit.
Infographic showing two 20 uF 370/440 VAC CBB65 motor run capacitors and signs indicating when to replace an AC capacitor.
BlueStars 20 uF 370/440 VAC CBB65 round motor run capacitor for air conditioner and heat pump systems.
BlueStars 20 uF 370/440 VAC CBB65 round motor run capacitor with dimensions and certification labels.
Infographic showing technical specifications for a 20 uF 370/440 VAC CBB65 motor run capacitor.
Top view of 20 uF 370/440 VAC motor run capacitor showing 2-terminal layout and C, F, and H/HERM connection labels.
Infographic showing 20 uF 370/440 VAC CBB65 round motor run capacitor with aluminum case and metalized film details.
Infographic guide for choosing a 20 uF 370/440 VAC CBB65 motor run capacitor for air conditioners and heat pumps.
Infographic showing 20 uF motor run capacitor applications for air conditioners, refrigerators, heat pumps, and compressors.
Technician installing a 20 uF 370/440 VAC CBB65 motor run capacitor into an air conditioner unit.
BlueStars 20 uF 370/440 VAC CBB65 motor run capacitor shown in a promotional graphic with an HVAC technician.
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20 uF MFD ±5% 370/440 VAC CBB65 Multi-Purpose Motor Run Round Capacitor 10000AFC - For Air Conditioner, Heat Pump

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20 MFD uF ± 5% MFD 370 V VAC or 440 Volt Multi-Purpose Motor Run Round Capacitor

Key Features

  • Capacitance: 20 Microfarad (MFD)
  • Tolerance: ±5%
  • Voltage Rating: Dual 370V or 440V AC
  • Frequency: 50/60 Hz
  • Shape: Round
  • Terminal Type: 1/4 inch male quick-connect
  • Operating Temperature Range: -40°C to +70°C

Replaces / Cross-Reference Part Numbers

  • Replaces any single-value 20 MFD round run capacitor with a 370V or 440V rating.
  • Commonly replaces parts with numbers such as C320, C420, PRCF20, CBB65, and 97F series.

Compatibility & Fitment

  • Suitable for use in single-phase motors, HVAC systems, air conditioners, heat pumps, compressors, and fan motors.
  • The dual voltage rating allows this capacitor to replace both 370 VAC and 440 VAC models.
  • Physical dimensions and terminal configuration are designed for broad compatibility with original equipment.

When to Replace

  • Motor hums but does not start.
  • Compressor or fan motor runs intermittently or overheats.
  • Visible damage to the existing capacitor, such as swelling, bulging, or leaking oil.
  • Capacitance measurement is outside the component's rated tolerance (±5%).

Installation Tips

  • Disconnect all electrical power to the unit before beginning service.
  • Safely discharge the existing capacitor by shorting the terminals with a properly insulated tool.
  • Confirm the MFD rating and voltage of the new capacitor match the unit's requirements.
  • Note the wire positions on the original capacitor's terminals before removal to ensure correct installation.
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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

Common symptoms of a failing capacitor include a humming sound from the motor or fan without it starting, the fan needing a manual push to begin spinning, or the air conditioner blowing warm air. If the top of the capacitor is domed or bulging, or if there is any sign of leaking oil or a burnt smell, it has failed and requires immediate replacement.
Yes. This capacitor is rated for 370/440 VAC, which means it is a universal replacement that can safely replace older 250V, 300V, 370V, 440V, and 450V capacitors of the same 20 uF rating. You must ensure the microfarad (uF or MFD) rating matches your original part exactly, but the voltage rating can be equal to or higher than the original.
This 20 uF round capacitor measures 1.77 inches (45mm) in diameter and 2.95 inches (75mm) in height. Please verify that you have sufficient clearance in your electrical box or mounting bracket before installation.
This is a standard CBB65 motor run capacitor designed for use in a wide range of HVAC systems, including residential air conditioners, heat pumps, and blower motors. As long as your system requires a 20 uF capacitor, this unit will function regardless of the brand of the equipment.
Installation typically takes 15 to 30 minutes. You will need a screwdriver to access the electrical panel and a pair of insulated needle-nose pliers to remove and attach the spade connectors. Always ensure the power to the unit is completely disconnected at the breaker before beginning.
Yes. Before removing the old capacitor, it is critical to discharge it safely, as it can hold a significant electrical charge even after the power is turned off. Use an insulated screwdriver to bridge the terminals to discharge any stored energy. Additionally, take a photo of the existing wiring configuration to ensure you reconnect the wires to the correct terminals on the new unit.