10 uF MFD ±5% 370/440 VAC CBB65 Oval Run Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump
10 uF 440VAC CBB65 oval run start capacitor with dual terminal connectors.
10 uF CBB65 oval run start capacitor with technical specification infographic showing voltage and material details.
10uF 370/440VAC CBB65 oval run start capacitor showing 3.5-inch height and 2-inch width dimensions.
AC unit showing symptoms of a faulty run start capacitor like hard starting, noise, and shutting off.
10uF 370/440VAC CBB65 oval run start capacitor for AC motors and heat pumps with installation safety note.
10 uF CBB65 oval run capacitor with terminal close-up and product specifications label.
Woman relaxing on a couch under an AC unit, promoting economical DIY repair solutions for HVAC appliances.
10 uF 440VAC CBB65 oval run start capacitor with dual terminal connectors.
10 uF CBB65 oval run start capacitor with technical specification infographic showing voltage and material details.
10uF 370/440VAC CBB65 oval run start capacitor showing 3.5-inch height and 2-inch width dimensions.
AC unit showing symptoms of a faulty run start capacitor like hard starting, noise, and shutting off.
10uF 370/440VAC CBB65 oval run start capacitor for AC motors and heat pumps with installation safety note.
10 uF CBB65 oval run capacitor with terminal close-up and product specifications label.
Woman relaxing on a couch under an AC unit, promoting economical DIY repair solutions for HVAC appliances.
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10 uF MFD ±5% 370/440 VAC CBB65 Oval Run Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump

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10 uF MFD ±5% 370/440V CBB65 Oval Run Start Capacitor

Key Features

  • Capacitance: 10 Microfarad (uF)
  • Tolerance: ±5%
  • Voltage Rating: 370/440 VAC
  • Frequency: 50/60 Hz
  • Model: CBB65
  • Shape: Oval
  • Construction: Aluminum case, oil-filled polypropylene film
  • Terminals: Standard 1/4 inch male spade terminals
  • Safety Rating: 10,000 AFC fault current protection

Replaces / Cross-Reference Part Numbers

  • Replaces any oval-shaped capacitor with matching specifications.
  • Ensure the replacement has a 10 uF capacitance and a voltage rating of 370V or 440V.

Compatibility & Fitment

  • Designed for continuous duty in motor run applications.
  • Used in air conditioners, heat pumps, condenser fan motors, compressors, and furnace blower motors.
  • Universal fit for applications requiring a 10 MFD oval run capacitor.

When to Replace

  • Motor hums but does not start.
  • Fan or blower operates at a reduced speed.
  • Compressor fails to engage.
  • Visible bulging, swelling, or fluid leakage from the capacitor casing.

Installation Tips

  • Disconnect all electrical power to the unit before beginning work.
  • Safely discharge the existing capacitor by shorting the terminals with an insulated tool.
  • Note the wiring configuration before disconnecting the old part.
  • Connect the wires to the corresponding terminals on the new capacitor.
  • Secure the capacitor in place using the original 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

Common signs of a failing capacitor include a fan motor that hums but won't start, a fan that requires a manual push to get moving, or an air conditioner that struggles to cool effectively. If the top of the capacitor appears domed or swollen, or if you notice a burning smell near the electrical panel, it is likely time for a replacement.
Yes. This capacitor is rated for both 370 VAC and 440 VAC. It is perfectly safe to use a 440V capacitor as a replacement for a 370V unit, as the higher voltage rating indicates the component's ability to handle electrical stress, which often results in a longer service life.
This oval-shaped capacitor measures approximately 51.5 mm (2.03 inches) in length, 31.5 mm (1.24 inches) in width, and 90 mm (3.54 inches) in height. Please ensure you have adequate clearance in your equipment's capacitor mounting bracket before installation.
Installation typically takes 15–30 minutes. You will need a screwdriver to open the access panel and a pair of needle-nose pliers to remove the spade connectors. Always ensure the power to the unit is completely disconnected at the breaker before beginning, and use an insulated screwdriver to safely discharge the old capacitor by touching the terminals together before handling.
Before installing, inspect the wiring connections for any signs of corrosion or melting. If the spade connectors are loose, they should be crimped slightly or replaced to ensure a tight, low-resistance connection. Additionally, verify that the fan motor spins freely by hand; if the motor bearings are seized, a new capacitor will not resolve the issue.