Marathon Brand 35+3 uF MFD 370/440 VAC Dual Run Round Capacitor CBB65 - Fits Condenser, Heat Pump, AC Motor - Replaces USA2226BA
BlueStars 35+3 uF 370/440 VAC round dual run capacitor for AC condenser and heat pump motors.
Four-step installation guide for 35+3 uF dual run capacitor showing power shutoff, location, and wiring instructions.
Infographic showing when to replace a 35+3 uF 370/440 VAC dual run round AC capacitor.
BlueStars 35+3 uF 370/440 VAC dual run round capacitor for AC condenser and heat pump systems.
BlueStars 35+3 uF 370/440 VAC dual run round capacitor with dimensions shown in an infographic.
Technical specification chart for 35+3 uF 370/440 VAC dual run round capacitor with product dimensions.
Top view of 35+3 uF dual run capacitor showing C, HERM, and FAN terminal labels for AC motor and condenser.
BlueStars 35+3 MFD 370/440 VAC dual run capacitor showing aluminum case and metalized polypropylene film construction.
Educational infographic guide for choosing a 35+3 uF 370/440 VAC dual run round capacitor.
Technician repairing an AC condenser unit with a 35+3 uF 370/440 VAC dual run round capacitor in the foreground.
Technician installing a 35+3 uF 370/440 VAC dual run round capacitor in an AC condenser unit.
Infographic showing wide range applications for 35+3 MFD dual run capacitor in AC, refrigerator, heat pump, and compressor.
BlueStars 35+3 uF 370/440 VAC round dual run capacitor for AC condenser and heat pump motors.
Four-step installation guide for 35+3 uF dual run capacitor showing power shutoff, location, and wiring instructions.
Infographic showing when to replace a 35+3 uF 370/440 VAC dual run round AC capacitor.
BlueStars 35+3 uF 370/440 VAC dual run round capacitor for AC condenser and heat pump systems.
BlueStars 35+3 uF 370/440 VAC dual run round capacitor with dimensions shown in an infographic.
Technical specification chart for 35+3 uF 370/440 VAC dual run round capacitor with product dimensions.
Top view of 35+3 uF dual run capacitor showing C, HERM, and FAN terminal labels for AC motor and condenser.
BlueStars 35+3 MFD 370/440 VAC dual run capacitor showing aluminum case and metalized polypropylene film construction.
Educational infographic guide for choosing a 35+3 uF 370/440 VAC dual run round capacitor.
Technician repairing an AC condenser unit with a 35+3 uF 370/440 VAC dual run round capacitor in the foreground.
Technician installing a 35+3 uF 370/440 VAC dual run round capacitor in an AC condenser unit.
Infographic showing wide range applications for 35+3 MFD dual run capacitor in AC, refrigerator, heat pump, and compressor.
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35+3 uF MFD 370/440 VAC Dual Run Round Capacitor CBB65 - Fits Condenser, Heat Pump, AC Motor - Replaces USA2226BA

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35+3 MFD uF 370/440 VAC Dual Round Capacitor CBB65

Key Features

  • Capacitance Rating: 35/3 Microfarad (MFD/uF)
  • Voltage Rating: 370/440 Volts AC (VAC)
  • Tolerance: ±6%
  • Construction: Round metal case, oil-filled polypropylene film
  • Terminals: 3 (Common, Fan, Compressor)
  • Safety: Built to industrial explosion-proof safety standards (UL certified)
  • Dimensions: Approximately 1.97 in / 50 mm diameter

Replaces / Cross-Reference Part Numbers

  • Replaces any round dual run capacitor with matching 35/3 MFD and 370V or 440V specifications.
  • Heil HQ1086678AX
  • CBB65-440R0335

Compatibility & Fitment

  • Designed for dual motor run applications to power a compressor and a fan motor.
  • Used in HVAC systems, central air conditioners, heat pumps, and condenser units.
  • Compatible with systems requiring either a 370 VAC or 440 VAC capacitor.

When to Replace

  • Compressor or fan motor fails to start.
  • A humming sound is audible from the unit without the motor engaging.
  • Existing capacitor shows physical signs of failure such as bulging, cracking, or leaking oil.
  • Measured capacitance is outside the specified tolerance range.

Installation Tips

  • Disconnect all electrical power to the unit before beginning work.
  • Safely discharge the old capacitor by shorting the terminals with an insulated tool.
  • Note the wire placement on the old capacitor's terminals (C, FAN, HERM) before disconnecting.
  • The new capacitor's MFD rating must match the original.
  • The new capacitor's voltage rating must be equal to or greater than the original.
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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 USA2226BA. It also cross-references with 43-25133-03, 43-101665-04, 43-26261-04, TRCFD353, C3353R, 97F9472, 12977, PRCD353, and 1086678.
Yes. A 440 VAC capacitor can safely replace a 370 VAC capacitor of the same microfarad (uF) rating. It is built to handle higher voltage thresholds, which often provides a longer service life in harsh operating environments.
If your AC unit or heat pump fails to start, makes a humming noise but the fan won't spin, or if the fan starts only after being manually pushed, the capacitor is likely failing. Other signs include the AC unit blowing warm air or the system shutting down intermittently due to the motor overheating.
Before installation, ensure the power to the HVAC unit is completely disconnected at the service disconnect box. Always discharge the old capacitor using an insulated screwdriver across the terminals before handling it. Additionally, check the contactor for signs of pitting or burnt wires, as a faulty contactor can cause premature capacitor failure.
For most technicians and experienced DIYers, the replacement takes approximately 15 to 30 minutes. You will primarily need a screwdriver to open the service panel and a pair of needle-nose pliers to transfer the wire connectors to the new terminals.
Capacitors are sensitive to heat and voltage spikes. Frequent cycling, poor airflow around the condenser unit, and high ambient temperatures can cause the internal dielectric to break down over time. If you find yourself replacing capacitors frequently, ensure your condenser coils are clean and free of debris to help the motor run cooler.