Lennox Brand 55+7.5 uF MFD ±5% 370/440 VAC CBB65B Dual Run Round Capacitor - Fits Condenser, Heat Pump - Replaces C35575R
55+7.5 uF MFD 370/440 VAC CBB65B round dual run capacitor for HVAC condenser and heat pump units.
Infographic showing four easy installation steps for a 55+7.5 uF dual run round capacitor in an AC condenser unit.
Infographic showing two 55+7.5 uF dual run capacitors and signs indicating when to replace an AC capacitor.
BlueStars 55+7.5 uF dual run round capacitor for AC condenser and heat pump systems.
BlueStars 55+7.5 uF dual run round capacitor with 4.73-inch height and 2.36-inch width dimensions.
Specification chart for 55+7.5 uF 370/440 VAC dual run round capacitor with technical details and product image.
Diagram showing 3-terminal layout for 55+7.5 uF dual run capacitor with Common, Herm, and Fan terminal labels.
BlueStars 55+7.5 uF dual run capacitor with aluminum case and metalized film construction details.
Educational infographic showing 55+7.5 uF dual run capacitor specifications for HVAC condenser and heat pump repair.
Technician installing a 55+7.5 uF CBB65B dual run round capacitor in an AC condenser unit.
Technician installing a 55+7.5 uF dual run round capacitor in an HVAC condenser unit.
Infographic showing wide range applications for 55+7.5 uF dual run capacitor in HVAC and refrigeration systems.
55+7.5 uF MFD 370/440 VAC CBB65B round dual run capacitor for HVAC condenser and heat pump units.
Infographic showing four easy installation steps for a 55+7.5 uF dual run round capacitor in an AC condenser unit.
Infographic showing two 55+7.5 uF dual run capacitors and signs indicating when to replace an AC capacitor.
BlueStars 55+7.5 uF dual run round capacitor for AC condenser and heat pump systems.
BlueStars 55+7.5 uF dual run round capacitor with 4.73-inch height and 2.36-inch width dimensions.
Specification chart for 55+7.5 uF 370/440 VAC dual run round capacitor with technical details and product image.
Diagram showing 3-terminal layout for 55+7.5 uF dual run capacitor with Common, Herm, and Fan terminal labels.
BlueStars 55+7.5 uF dual run capacitor with aluminum case and metalized film construction details.
Educational infographic showing 55+7.5 uF dual run capacitor specifications for HVAC condenser and heat pump repair.
Technician installing a 55+7.5 uF CBB65B dual run round capacitor in an AC condenser unit.
Technician installing a 55+7.5 uF dual run round capacitor in an HVAC condenser unit.
Infographic showing wide range applications for 55+7.5 uF dual run capacitor in HVAC and refrigeration systems.
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55+7.5 uF MFD ±5% 370/440 VAC CBB65B Dual Run Round Capacitor - Fits Condenser, Heat Pump - Replaces C35575R

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55+7.5 uF MFD ±5% 370 or 440 Volt AC CBB65B Dual Run Round Capacitor

Key Features

  • Model: CBB65B
  • Capacitance: 55 + 7.5 Microfarad (µF)
  • Voltage Rating: 370V or 440V AC
  • Capacitance Tolerance: ±5%
  • Frequency: 50/60 Hz
  • Shape: Round
  • Case Material: Aluminum
  • Terminals: C (Common), FAN (Fan Motor), HERM (Compressor Motor)
  • Dielectric Material: Metalized polypropylene film
  • Dimensions: 2.36 in (60mm) Diameter, 3.94 in (100mm) Height
  • Operational Temperature Range: -40°C to +70°C
  • Built-in safety pressure interrupter
  • No Polychlorinated Biphenyls (PCBs)

Replaces / Cross-Reference Part Numbers

  • Replaces any round dual run capacitor with matching specifications.
  • Verify that the original capacitor has a 55+7.5 MFD rating.
  • Compatible with both 370 VAC and 440 VAC applications.
  • Ensure physical dimensions allow for a proper fit in the existing mounting bracket.

Compatibility & Fitment

  • Designed for heavy-duty, continuous operation in single-phase motors.
  • Commonly used in HVAC systems, air conditioners, heat pumps, and condenser fan motors.
  • Serves as a replacement component for various brands of air conditioning and motor equipment where the electrical and physical specifications match.

When to Replace

  • The compressor or fan motor hums but fails to start.
  • The fan motor runs slower than usual or does not spin.
  • The air conditioner does not blow cold air.
  • The capacitor case is visibly swollen, bulging, or leaking fluid.
  • A multimeter test shows capacitance is outside the ±5% tolerance range.

Installation Tips

  • WARNING: Disconnect all electrical power to the unit before handling or replacing the capacitor.
  • Safely discharge the existing capacitor by shorting the terminals with an insulated-handle screwdriver.
  • Note or photograph the wire connections to the C, FAN, and HERM terminals before disconnecting.
  • Connect the wires to the corresponding terminals on the new capacitor.
  • Ensure the capacitor is secured with the original mounting strap or bracket.
  • Professional installation is recommended if you are unfamiliar with electrical components.
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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 capacitor is a direct replacement for OEM part number C35575R. It also cross-references with 97F9973, 97F9874, 97F9839, TRCFD5575, C45575R, TP-CAP-55/7.5/440R, and CAP-55/7.5-450.
Yes. A 440V capacitor is rated to handle higher voltage and can safely replace a 370V capacitor of the same MFD rating. You cannot, however, use a 370V capacitor to replace a 440V unit.
If your air conditioner or heat pump is struggling to start, making a humming noise but not engaging the compressor, or if the fan motor is spinning slowly or not at all, the capacitor is often the culprit. A bulging or swollen top on the capacitor is a clear physical indicator that the unit has failed and needs replacement.
No. As long as the MFD (microfarad) ratings and voltage match, the shape of the capacitor does not affect its electrical performance. You can use a round capacitor to replace an oval one, provided there is enough physical space in the condenser unit's electrical compartment.
Replacing a capacitor is a straightforward task that typically takes 15 to 30 minutes. You will need a screwdriver to remove the service panel and a pair of insulated needle-nose pliers to disconnect the wires. Always ensure the power to the unit is completely shut off at the breaker before beginning, and use an insulated screwdriver to discharge the old capacitor terminals before touching them.
This is a dual-run capacitor, meaning it serves two motors. The 55 MFD rating is for the main compressor motor, while the 7.5 MFD rating is for the condenser fan motor. It is critical to match these values exactly to ensure your motors receive the correct amount of current to operate efficiently.