GE Brand 45+10 uF MFD ±5% 370/440 VAC Dual Run Start Round Capacitor CBB65 CBB65B 50/60 Hz - Fits AC Unit Fan Motor, Heat Pump
BlueStars 45+10 uF dual run round capacitor for AC unit fan motors and heat pumps.
Step-by-step installation guide for 45+10 uF dual run capacitor on an AC unit fan motor.
Infographic showing 45+10 uF dual run capacitor with signs indicating when to replace your AC unit capacitor.
45+10 uF dual run round capacitor for AC unit and heat pump fan motors shown in a lifestyle marketing graphic.
BlueStars 45+10 uF dual run round capacitor with technical specifications chart for AC unit and heat pump motors.
45+10 uF dual run capacitor with 4.72 inch height and 2.36 inch diameter dimensions for AC unit motors.
Infographic showing AC unit and symptoms fixed by a 45+10 uF dual run start capacitor replacement.
45+10 uF dual run capacitor with rust-free phenolic resin casing for AC unit fan motor and heat pump.
45+10 uF dual run capacitor with close-up of terminal connectors and installation safety instructions.
Woman relaxing on a couch under an air conditioner with BlueStars DIY HVAC repair promotional text.
Infographic showing wide application range for dual run start capacitor in AC units, refrigerators, and heat pumps.
Technician installing a 45+5 uF dual run capacitor in an AC unit with a close-up product view.
BlueStars 45+10 uF dual run round capacitor for AC unit fan motors and heat pumps.
Step-by-step installation guide for 45+10 uF dual run capacitor on an AC unit fan motor.
Infographic showing 45+10 uF dual run capacitor with signs indicating when to replace your AC unit capacitor.
45+10 uF dual run round capacitor for AC unit and heat pump fan motors shown in a lifestyle marketing graphic.
BlueStars 45+10 uF dual run round capacitor with technical specifications chart for AC unit and heat pump motors.
45+10 uF dual run capacitor with 4.72 inch height and 2.36 inch diameter dimensions for AC unit motors.
Infographic showing AC unit and symptoms fixed by a 45+10 uF dual run start capacitor replacement.
45+10 uF dual run capacitor with rust-free phenolic resin casing for AC unit fan motor and heat pump.
45+10 uF dual run capacitor with close-up of terminal connectors and installation safety instructions.
Woman relaxing on a couch under an air conditioner with BlueStars DIY HVAC repair promotional text.
Infographic showing wide application range for dual run start capacitor in AC units, refrigerators, and heat pumps.
Technician installing a 45+5 uF dual run capacitor in an AC unit with a close-up product view.
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45+10 uF MFD ±5% 370/440 VAC Dual Run Start Round Capacitor CBB65 CBB65B 50/60 Hz - Fits AC Unit Fan Motor, Heat Pump

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45+10 uF ±5% 45/10 MFD 370/440 VAC Dual Run Start Round Capacitor

Key Features

  • Capacitance Rating: 45/10 Microfarads (MFD/uF)
  • Voltage Rating: 370/440 Volts AC
  • Capacitance Tolerance: ±5%
  • Frequency: 50/60 Hz
  • Shape: Round
  • Terminals: 3 (FAN, HERM, C)
  • Operating Temperature: -40°C to +70°C (-40°F to +158°F)
  • Case Material: Aluminum
  • Dimensions (Typical): 2.0 in. Diameter x 3.9 in. Height (50 mm x 100 mm)

Replaces / Cross-Reference Part Numbers

  • Replaces any round capacitor with matching 45+10 MFD and 370V or 440V specifications.
  • JARD 12872

Compatibility & Fitment

  • Dual run capacitor for operating a compressor motor and a fan motor simultaneously.
  • Suitable for use in air conditioning units, heat pumps, condenser fan motors, and compressors.
  • Designed for continuous duty in single-phase and three-phase motor applications.
  • Dual voltage rating allows for use as a replacement in both 370 VAC and 440 VAC systems.

When to Replace

  • The connected motor hums but does not start.
  • Fan or compressor runs intermittently or fails to start.
  • Capacitor casing is physically swollen, cracked, or leaking oil.
  • Capacitance measurement is outside the rated tolerance when tested with a multimeter.

Installation Tips

  • Disconnect all electrical power to the equipment before servicing.
  • Safely discharge the old capacitor by shorting its terminals with an insulated-handle tool.
  • Note or photograph the wire connections to the FAN, HERM, and C terminals before removal.
  • Ensure the replacement capacitor's MFD (uF) rating matches the original. The voltage rating must be equal to or greater than the original.
  • Confirm the physical dimensions (diameter and height) for proper fit within the mounting bracket.
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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

This is a dual-run capacitor, meaning it contains two capacitors in one housing. The 45 MFD side is designed to provide the necessary boost for your compressor motor, while the 10 MFD side powers the condenser fan motor. Both are contained within a single unit to save space in your HVAC electrical cabinet.
Yes. This capacitor is rated for both 370 VAC and 440 VAC. It is perfectly safe to use a 440 VAC replacement in a system that originally called for a 370 VAC capacitor, as the higher voltage rating simply indicates a greater tolerance for electrical surges.
If your air conditioner or heat pump is struggling to start, making a humming noise without the fan spinning, or if the unit is blowing warm air while the compressor is off, the capacitor is often the culprit. A bulging or domed top on the capacitor is a visual indicator that it has failed and needs immediate replacement.
Always ensure the power to your HVAC unit is completely disconnected at the breaker or the local disconnect box. Before removing the old capacitor, use an insulated screwdriver to discharge the stored energy by touching the terminals to the common (C) terminal. Take a photo of the existing wiring configuration so you can replicate it exactly on the new unit.
Replacing a capacitor is a straightforward task that typically takes 15 to 30 minutes. You will generally only need a screwdriver to open the electrical panel and a pair of needle-nose pliers to remove and attach the spade connectors. If you are uncomfortable working with electrical components, consult a professional technician.
Capacitors are sensitive to heat and electrical stress. Over time, the internal dielectric fluid can break down due to extreme outdoor temperatures, frequent power cycling, or voltage spikes. Regular maintenance, such as keeping the condenser coils clean to ensure proper airflow, can help reduce the operating temperature and extend the life of your capacitor.