Emerson Brand 70+10 uF MFD ±5% 370/440 VAC CBB65 50/60 Hz Dual Run Start Capacitor - Fits AC Unit Fan Motor, Heat Pump
BlueStars 70+10 uF MFD 370/440 VAC dual run start capacitor for AC unit fan motors and heat pumps.
Four-step installation guide for 70+10 uF dual run start capacitor for AC unit and heat pump motors.
Infographic showing two 70+10 uF dual run start capacitors with signs indicating when to replace your AC unit capacitor.
BlueStars 70+10 uF 370/440 VAC dual run capacitor for AC unit and heat pump fan motors.
BlueStars 70+10 uF 370/440 VAC dual run capacitor with dimensions labeled for AC unit and heat pump motor.
Infographic showing specifications for a 70+10 uF dual run start capacitor for AC units and heat pumps.
Diagram of 70+10 uF dual run capacitor showing C, HERM, and FAN terminal labels for AC unit and heat pump motors.
BlueStars 70+10 uF dual run start capacitor with aluminum case and metalized polypropylene film construction.
Technician installing a 70+10 uF dual run start capacitor into an AC unit outdoor condenser.
Informational guide for selecting a 70+10 uF 370/440 VAC dual run capacitor for AC and heat pump motors.
Technician installing a 70+10 uF 370/440 VAC dual run capacitor in an AC condenser unit.
Infographic showing wide range applications for 70+10 uF dual run capacitor in AC units, refrigerators, and heat pumps.
BlueStars 70+10 uF MFD 370/440 VAC dual run start capacitor for AC unit fan motors and heat pumps.
Four-step installation guide for 70+10 uF dual run start capacitor for AC unit and heat pump motors.
Infographic showing two 70+10 uF dual run start capacitors with signs indicating when to replace your AC unit capacitor.
BlueStars 70+10 uF 370/440 VAC dual run capacitor for AC unit and heat pump fan motors.
BlueStars 70+10 uF 370/440 VAC dual run capacitor with dimensions labeled for AC unit and heat pump motor.
Infographic showing specifications for a 70+10 uF dual run start capacitor for AC units and heat pumps.
Diagram of 70+10 uF dual run capacitor showing C, HERM, and FAN terminal labels for AC unit and heat pump motors.
BlueStars 70+10 uF dual run start capacitor with aluminum case and metalized polypropylene film construction.
Technician installing a 70+10 uF dual run start capacitor into an AC unit outdoor condenser.
Informational guide for selecting a 70+10 uF 370/440 VAC dual run capacitor for AC and heat pump motors.
Technician installing a 70+10 uF 370/440 VAC dual run capacitor in an AC condenser unit.
Infographic showing wide range applications for 70+10 uF dual run capacitor in AC units, refrigerators, and heat pumps.
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70+10 uF MFD ±5% 370/440 VAC CBB65 50/60 Hz Dual Run Start Capacitor - Fits AC Unit Fan Motor, Heat Pump

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70+10 uF ±5% 70/10 MFD 370/440 VAC Dual Run Start Round Capacitor 50/60Hz

Key Features

  • Capacitance: 70 + 10 Microfarad (uF)
  • Tolerance: ±5%
  • Voltage Rating: 370 or 440 VAC
  • Frequency: 50/60 Hz
  • Shape: Round
  • Terminals: Three (C, HERM, FAN) with 0.250 in. quick-connects
  • Operating Temperature: -40 °C to +70 °C (-104 °F to +158 °F)
  • Construction: Oil-filled metal case, non-PCB
  • Dimensions: 2.36 in. Diameter x 4.33 in. Height (60mm x 110mm)

Replaces / Cross-Reference Part Numbers

  • Replaces any round dual run capacitor with matching 70/10 MFD and 370V or 440V specifications.
  • Commonly replaces capacitors in CBB65 and similar series.

Compatibility & Fitment

  • Designed for HVAC applications including air conditioners, heat pumps, and condenser units.
  • Powers a compressor motor (HERM terminal) and a fan motor (FAN terminal).
  • Verify specifications (uF, VAC, and physical dimensions) of the original capacitor before ordering.

When to Replace

  • The fan motor runs but the compressor does not start.
  • The compressor or fan hums but does not start.
  • The unit starts but then shuts off intermittently.
  • Visible signs of damage, such as a bulging or leaking capacitor case.
  • Capacitance measures outside of the ¬±5% tolerance range when tested.

Installation Tips

  • Disconnect all electrical power to the HVAC unit before servicing.
  • Safely discharge the existing capacitor by shorting the terminals with an insulated screwdriver.
  • Photograph or note the wire placement on the C, HERM, and FAN terminals before removal.
  • Ensure the new capacitor is physically secured with the original mounting strap or bracket.
  • Professional installation is recommended for those unfamiliar with HVAC electrical systems.
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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 symptoms of a failing capacitor include the AC unit failing to start, a humming sound coming from the condenser unit, or the fan motor running slowly or not at all. You may also notice the top of the capacitor is domed or bulging, which indicates internal pressure buildup and immediate failure.
This unit is a direct replacement for 810P7010H44P46A5X, USA2220BA, PRCFD7010, PRCFD7010A, TRCD7010, SE7010, CD70+10X370R, CAP-70/10/440R, and TP-CAP-70/10/440R.
Yes. A 440V capacitor is interchangeable with a 370V capacitor of the same MFD rating. The voltage rating indicates the maximum voltage the capacitor can handle; using a 440V replacement in a 370V system provides a higher safety margin and often results in a longer service life.
Installation is generally straightforward and takes about 15 to 30 minutes. You will need a screwdriver to remove the access panel and a pair of insulated needle-nose pliers to disconnect and reconnect the spade terminals. Always ensure the power to the HVAC unit is completely shut off at the breaker before beginning work, and use an insulated screwdriver to safely discharge the old capacitor before touching the terminals.
Capacitors are heat-sensitive components. Over time, the internal dielectric material degrades due to the high ambient temperatures inside the condenser unit and the constant electrical stress of starting the compressor and fan motor. Regular exposure to extreme heat and power surges are the primary causes of premature failure.