Marathon Brand 10 uF MFD ±5% 370/440 VAC CBB65 Oval Run Start Capacitor - Fits AC Unit Fan Motor, Pool Pump - Replaces 27L669 - 2 Pack
Two 10uF 440VAC CBB65 oval run start capacitors for AC unit fan motors and pool pumps.
Dimensional diagram of 10 uF 370/440 VAC CBB65 oval run start capacitor showing height, width, and terminal view.
Specification chart for 10 uF 370/440 VAC CBB65 run start capacitor with technical details.
Diagram showing 2-terminal oval run capacitor top view with Common, Fan, and Compressor terminal labels.
Infographic showing 10uF 370/440VAC CBB65 run capacitor features including metalized film and aluminum case construction.
Educational infographic showing how to choose a 10uF 370/440VAC CBB65 oval run start capacitor for AC and pool motors.
Technician installing a 10 uF CBB65 oval run start capacitor in an AC unit.
Technician installing a 10 uF 370/440 VAC CBB65 oval run start capacitor in an AC condenser unit.
Infographic showing wide range applications for 10 uF run start capacitor including AC, refrigerator, and heat pump.
Two 10uF 440VAC CBB65 oval run start capacitors for AC unit fan motors and pool pumps.
Dimensional diagram of 10 uF 370/440 VAC CBB65 oval run start capacitor showing height, width, and terminal view.
Specification chart for 10 uF 370/440 VAC CBB65 run start capacitor with technical details.
Diagram showing 2-terminal oval run capacitor top view with Common, Fan, and Compressor terminal labels.
Infographic showing 10uF 370/440VAC CBB65 run capacitor features including metalized film and aluminum case construction.
Educational infographic showing how to choose a 10uF 370/440VAC CBB65 oval run start capacitor for AC and pool motors.
Technician installing a 10 uF CBB65 oval run start capacitor in an AC unit.
Technician installing a 10 uF 370/440 VAC CBB65 oval run start capacitor in an AC condenser unit.
Infographic showing wide range applications for 10 uF run start capacitor including AC, refrigerator, and heat pump.
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10 uF MFD ±5% 370/440 VAC CBB65 Oval Run Start Capacitor - Fits AC Unit Fan Motor, Pool Pump - Replaces 27L669 - 2 Pack

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10 uF/MFD ±5% 10 MFD 370/440V CBB65 Oval Run Start Capacitor - Pack of 2

Key Features

  • Quantity: 2 capacitors
  • Capacitance: 10 µF / MFD
  • Tolerance: ±5%
  • Voltage Rating: 370 / 440 Volts AC (VAC)
  • Frequency: 50 / 60 Hz
  • Model: CBB65
  • Shape: Oval
  • Dielectric Material: Metalized polypropylene film
  • Case Material: Aluminum
  • Safety: Built-in pressure-sensitive interrupter
  • Operating Temperature Range: -40°C to +70°C
  • Terminals: Standard 1/4 inch male quick-connects
  • Standards Compliance: Meets EIA-456-A specifications

Replaces / Cross-Reference Part Numbers

  • Replaces any brand of oval-shaped run capacitor with matching 10 µF/MFD capacitance and 370V or 440V AC voltage ratings.
  • Ensure physical dimensions (height and width) are compatible with your equipment's mounting bracket.

Compatibility & Fitment

  • Designed for continuous duty in single-phase motor run applications.
  • Commonly used for compressor and fan motors in air conditioners, heat pumps, refrigerators, and other HVAC systems.
  • The dual 370/440V rating allows for use in both 370V and 440V applications.

When to Replace

  • Motor struggles to start, makes a humming noise, or will not start.
  • Fan motor requires a manual push to start spinning.
  • The capacitor housing is visibly swollen, cracked, or leaking fluid.
  • Measured capacitance is outside the specified ±5% tolerance range.

Installation Tips

  • Disconnect all electrical power to the equipment before beginning work.
  • Safely discharge the existing capacitor by shorting across the terminals with an insulated-handle tool.
  • Verify the µF (MFD) rating matches the original capacitor. The voltage rating of the replacement can be equal to or higher than the original, but not lower.
  • Note the wire placement on the old capacitor terminals before disconnecting. Replicate the connections on the new capacitor. AC capacitors are not polarized.
  • Secure the new capacitor with the original mounting hardware.
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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 signs of a failing run capacitor include a humming sound from the motor, the fan failing to start on its own, or the motor running sluggishly. If the top of the capacitor appears domed or swollen, or if you notice any leaking oil or a burnt smell, it has failed and must be replaced immediately.
Capacitors are defined by their electrical specifications rather than just a part number. As long as your original capacitor is rated for 10 µF (microfarads) and 370 VAC or 440 VAC, this unit is a suitable replacement. It is a direct replacement for part number 27L669 and functions in any application requiring a 10 µF run capacitor.
Yes. A 440 VAC capacitor can safely replace a 370 VAC capacitor of the same microfarad rating. It is common practice to use a higher voltage rating as it provides a greater safety margin and often results in a longer service life for the component.
You will typically need a screwdriver to access the electrical panel, a pair of insulated needle-nose pliers to remove the spade connectors, and a pair of insulated pliers or a screwdriver with an insulated handle to safely discharge the old capacitor before handling it. The entire process generally takes 15–30 minutes.
Always turn off the power to the unit at the disconnect or circuit breaker before beginning. Even when powered off, capacitors can store a lethal electrical charge. Before touching the terminals, use an insulated tool to short the terminals together to ensure the capacitor is fully discharged.
The most common cause of failure is heat. Capacitors are sensitive to high ambient temperatures, such as those found in outdoor AC units or pool pump enclosures. Over time, the internal dielectric material degrades, leading to a loss of capacitance. Ensuring your equipment is free of debris and has proper airflow can help extend the life of your new capacitor.