35+7.5 uF MFD 370/440 VAC Dual Run Capacitor CBB65B - Fits AC Motor, Fan Start, Heat Pump - Replaces TRCFD3575, Z97F9830
BlueStars 35+7.5 uF 370/440 VAC dual run capacitor for AC motors and heat pumps.
Step-by-step installation guide for 35+7.5 uF dual run capacitor in AC motor and heat pump systems.
Infographic showing when to replace a 35+7.5 uF 370/440 VAC dual run AC capacitor due to common failure symptoms.
35+7.5 uF dual run capacitor for AC and heat pump systems shown with a couple relaxing in a living room.
35+7.5 uF 370/440 VAC dual run capacitor with dimensions and safety certification labels.
Specification chart for 35+7.5 uF 370/440 VAC dual run capacitor with technical dimensions and features.
Diagram showing 3-terminal layout for 35+7.5 uF dual run capacitor with Common, Herm, and Fan terminal labels.
Infographic showing 35+7.5 uF dual run capacitor features including aluminum case and metalized polypropylene film.
Educational infographic showing how to choose a 35+7.5 uF 370/440 VAC dual run capacitor for AC and motor applications.
Technician installing a 35+7.5 uF 370/440 VAC dual run capacitor in an AC condenser unit.
BlueStars 35+7.5 uF 370/440 VAC dual run capacitor for AC motor and heat pump repair.
Infographic showing wide range applications for 35+7.5 uF dual run capacitor in AC, refrigerator, heat pump, and compressor.
BlueStars 35+7.5 uF 370/440 VAC dual run capacitor for AC motors and heat pumps.
Step-by-step installation guide for 35+7.5 uF dual run capacitor in AC motor and heat pump systems.
Infographic showing when to replace a 35+7.5 uF 370/440 VAC dual run AC capacitor due to common failure symptoms.
35+7.5 uF dual run capacitor for AC and heat pump systems shown with a couple relaxing in a living room.
35+7.5 uF 370/440 VAC dual run capacitor with dimensions and safety certification labels.
Specification chart for 35+7.5 uF 370/440 VAC dual run capacitor with technical dimensions and features.
Diagram showing 3-terminal layout for 35+7.5 uF dual run capacitor with Common, Herm, and Fan terminal labels.
Infographic showing 35+7.5 uF dual run capacitor features including aluminum case and metalized polypropylene film.
Educational infographic showing how to choose a 35+7.5 uF 370/440 VAC dual run capacitor for AC and motor applications.
Technician installing a 35+7.5 uF 370/440 VAC dual run capacitor in an AC condenser unit.
BlueStars 35+7.5 uF 370/440 VAC dual run capacitor for AC motor and heat pump repair.
Infographic showing wide range applications for 35+7.5 uF dual run capacitor in AC, refrigerator, heat pump, and compressor.
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35+7.5 uF MFD 370/440 VAC Dual Run Capacitor CBB65B - Fits AC Motor, Fan Start, Heat Pump - Replaces TRCFD3575, Z97F9830

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35+7.5 uf MFD ±5% 370 or 440 Volt AC CBB65B Dual Run Round Capacitor

Key Features

  • Capacitance Rating: 35 + 7.5 Microfarad (MFD)
  • Capacitance Tolerance: ±5%
  • Voltage Rating: 370VAC or 440VAC
  • Frequency: 50/60Hz
  • Operating Temperature: -40°C to +70°C
  • Shape: Round
  • Construction: Aluminum case with three terminals (Common, Fan, Hermetic Compressor)
  • Function: Serves as a dual run capacitor, supporting a compressor motor and a fan motor simultaneously.

Replaces / Cross-Reference Part Numbers

  • Replaces any brand of round dual run capacitor with matching 35/7.5 MFD capacitance and a voltage rating of either 370V or 440V.
  • Compatible replacement for CBB65 and CBB65B type capacitors.
  • Ensure the physical dimensions (diameter and height) fit your equipment's mounting bracket. A 440V capacitor can replace a 370V capacitor, but not vice-versa.

Compatibility & Fitment

  • Designed for use in residential and commercial HVAC systems, central air conditioners, and heat pumps.
  • Powers compressor and fan motors in outdoor condenser units.
  • Suitable for various AC motor run applications that require a dual capacitor.

When to Replace

  • The fan motor runs, but the compressor does not start.
  • The air conditioner or heat pump makes a humming noise but will not start.
  • The fan blades need a manual push to begin spinning.
  • Visible signs of failure on the existing capacitor, such as a bulging top, swelling, or fluid leakage.

Installation Tips

  • Warning: Disconnect all electrical power to the unit before performing service. Stored energy in a capacitor can cause severe electrical shock.
  • Safely discharge the old capacitor by shorting across the terminals with an insulated screwdriver.
  • Note or photograph the wire connections to the C (Common), FAN, and HERM terminals before disconnecting.
  • Connect the wires to the corresponding terminals on the new capacitor.
  • Secure the new capacitor with the original mounting strap.
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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 designed for use in single-phase AC systems, including air conditioners, heat pumps, condensing units, and various blower or fan motors. It features a dual-run design, where the 35 MFD side powers the compressor and the 7.5 MFD side powers the condenser fan motor.
This unit serves as a direct replacement for TRCFD3575 and Z97F9830. It is compatible with any system requiring a 35/7.5 MFD capacitor rated for 370V or 440V.
Yes. A 440V capacitor is interchangeable with a 370V capacitor of the same MFD rating. Using a higher voltage rating is perfectly safe and often provides better durability against power surges.
If your AC unit is struggling to start, making a humming noise but not engaging the compressor, or if the condenser fan is spinning slowly or not at all, the capacitor is likely failing. Another sign is a capacitor that appears physically swollen, domed at the top, or shows signs of leaking oil.
Always turn off the power to the HVAC unit at the disconnect box or circuit breaker before opening the service panel. Capacitors store a significant electrical charge even when the power is off; you must discharge the capacitor using an insulated screwdriver by bridging the terminals before attempting to remove any wires.
For most technicians and experienced DIYers, the replacement process takes approximately 15 to 30 minutes. You will typically need a screwdriver to remove the access panel and a pair of needle-nose pliers to disconnect and reconnect the spade terminals.