[Lifetime Warranty] 10 uF MFD ±5% 370/440 VAC CBB65 CBB65A Oval Run Start Capacitor - Fits AC Unit Fan Motor, Pool Pump, Condenser
10 uF 370/440 VAC CBB65 oval run start capacitor for AC unit fan motors and pool pumps.
10 uF 370/440 VAC CBB65 oval run capacitor with dimensions and terminal view for AC fan motors and pool pumps.
Specification chart for 10uF 370/440VAC CBB65 round run start capacitor with technical details.
Top view of 10 uF CBB65 oval run capacitor showing 2-terminal layout with Common and Fan/Herm labels.
Infographic showing 10uF 370/440VAC CBB65 run capacitor features including metalized film and aluminum case construction.
Infographic guide for selecting a 10 uF 370/440 VAC CBB65 run start capacitor for AC and motor applications.
Technician installing a 10 uF 370/440 VAC CBB65 oval run start capacitor into an AC unit.
10 uF 370/440 VAC CBB65 run capacitor shown in a promotional graphic with an HVAC technician repairing an AC unit.
Infographic showing 10uF 370/440VAC capacitor applications for AC, refrigerator, heat pump, and compressor motors.
Four-step instructional guide showing how to install a 10 uF CBB65 run start capacitor for AC units and motors.
10 uF 370/440 VAC CBB65 oval run start capacitor for AC unit fan motors and pool pumps.
10 uF 370/440 VAC CBB65 oval run capacitor with dimensions and terminal view for AC fan motors and pool pumps.
Specification chart for 10uF 370/440VAC CBB65 round run start capacitor with technical details.
Top view of 10 uF CBB65 oval run capacitor showing 2-terminal layout with Common and Fan/Herm labels.
Infographic showing 10uF 370/440VAC CBB65 run capacitor features including metalized film and aluminum case construction.
Infographic guide for selecting a 10 uF 370/440 VAC CBB65 run start capacitor for AC and motor applications.
Technician installing a 10 uF 370/440 VAC CBB65 oval run start capacitor into an AC unit.
10 uF 370/440 VAC CBB65 run capacitor shown in a promotional graphic with an HVAC technician repairing an AC unit.
Infographic showing 10uF 370/440VAC capacitor applications for AC, refrigerator, heat pump, and compressor motors.
Four-step instructional guide showing how to install a 10 uF CBB65 run start capacitor for AC units and motors.
Lifetime Warranty

[Lifetime Warranty] 10 uF MFD ±5% 370/440 VAC CBB65 CBB65A Oval Run Start Capacitor - Fits AC Unit Fan Motor, Pool Pump, Condenser

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

Key Features

  • Capacitance: 10 Microfarad (uF/MFD)
  • Tolerance: ±5%
  • Voltage Rating: Dual rated for 370V or 440V AC
  • Frequency: 50/60Hz
  • Model: CBB65
  • Shape: Oval
  • Construction: Oil-filled metallized polypropylene film
  • Safety: Integrated pressure-sensitive interrupter
  • Terminals: Standard 1/4 inch male terminals

Replaces / Cross-Reference Part Numbers

Replaces any single-value, oval-shaped run capacitor with identical 10 uF capacitance and 370V or 440V specifications. Serves as a direct replacement for CBB65 and CBB65A models with matching ratings.

Compatibility & Fitment

Designed for continuous duty in a variety of motor-run applications:

  • Air conditioner condenser fan motors
  • Heat pump compressors and fan motors
  • Furnace blower motors
  • Pool and spa pump motors
  • Other single-phase AC electric motors

When to Replace

Replacement may be necessary if you observe the following symptoms:

  • Motor hums but does not start
  • Fan or motor requires a manual push to start
  • AC unit compressor fails to engage
  • Unit runs intermittently or blows warm air
  • Visible bulging, cracking, or fluid leakage from the capacitor case

Installation Tips

  • Disconnect all electrical power to the unit before performing any work.
  • Safely discharge the existing capacitor by shorting across the terminals with an insulated screwdriver.
  • Verify that the uF (MFD) rating matches the original capacitor. The voltage rating can be equal to or higher than the original, but not lower.
  • Connect wires to the new terminals. Polarity is not a factor for two-terminal AC capacitors.
  • Secure the new capacitor in the original mounting bracket.

FAQ

This capacitor is commonly used in single-phase HVAC condenser fan motors, outdoor AC condensing units, heat pump fan motors, and some pool pump or spa pump motors that call for a 10 microfarad run capacitor. The key match points are the capacitance value (10 uF), the voltage rating (370 or 440 VAC), the capacitor style (CBB65/CBB65A oval metal can), and the terminal configuration. Always confirm the motor or original capacitor label before ordering.
10 uF is the capacitance rating the motor is designed to use. ±5% is the allowed tolerance range, meaning the measured value should stay close to 10 microfarads. 370/440 VAC is the maximum operating voltage rating. A 440 VAC capacitor is commonly used in place of a 370 VAC capacitor when the capacitance and physical fit are correct, but you should not replace a higher required voltage rating with a lower one.
A CBB65 or CBB65A capacitor of this type is typically a run capacitor, not a start capacitor. Run capacitors stay in the circuit while the motor operates and help it run efficiently and maintain torque. Start capacitors are usually rated differently and are used only briefly during startup. Always match the capacitor type specified by the equipment manufacturer.
Typical symptoms include a condenser fan motor that hums but does not start, a fan blade that starts only when pushed by hand, intermittent motor starting, overheating, reduced airflow, loud buzzing from the outdoor unit, or a pool pump motor that struggles to come up to speed. In some cases the capacitor may look swollen, leaking, or rusted, but capacitors can also fail with no visible damage.
Match these details from the old part or motor data label: 10 uF capacitance, 370 or 440 VAC rating, CBB65/CBB65A style, oval shape if required by the mounting bracket, and the same number and type of terminals. The capacitance value should match exactly. The voltage rating can be the same or higher, but not lower. Also make sure the new capacitor physically fits the mounting location.
Replacement is usually a straightforward service job if you are comfortable working around electrical equipment. Common tools include a screwdriver or nut driver, needle-nose pliers, and possibly a phone camera or labels to record wire positions. For many AC condenser units or pool pumps, the swap itself often takes about 10 to 30 minutes. Shut off power at the disconnect and breaker first, and safely discharge the old capacitor before touching the terminals.
Inspect the wiring terminals for corrosion or looseness, verify the motor spins freely, and check for signs of overheating, water intrusion, insect damage, or burned contacts in the control compartment. If the old capacitor failed, it is also wise to inspect the fan motor or pump motor for high amp draw, bearing drag, or other issues that may have caused the capacitor to fail prematurely.
The most common causes are heat, age, voltage stress, frequent hard starts, poor airflow around the condensing unit, vibration, and moisture exposure. In pool or outdoor equipment, long-term weather exposure and high cabinet temperatures are especially common causes. A failing motor can also damage a capacitor by drawing excessive current or running hotter than normal.