45+5 uF MFD 370/440 VAC Round Dual Circular Run Capacitor CBB65 50/60 Hz - For AC Motor Run, Fan Start, Condenser
45+5 uF 440 VAC CBB65 round dual run capacitor for AC motor and condenser units.
45+5 uF 370/440 VAC round dual run capacitor with technical specification infographic.
45+5 uF CBB65 dual run capacitor showing 4-inch height and 2.37-inch diameter dimensions for HVAC compatibility.
Air conditioner units showing symptoms for replacement of a 45+5 MFD dual run capacitor.
45+5 uF 370/440 VAC round dual run capacitor with technical specification label visible.
45+5 uF CBB65 round dual run capacitor with aluminum casing and terminal close-up view.
Woman relaxing on a couch under a functioning AC unit, promoting BlueStars DIY HVAC repair solutions.
45+5 uF 440 VAC CBB65 round dual run capacitor for AC motor and condenser units.
45+5 uF 370/440 VAC round dual run capacitor with technical specification infographic.
45+5 uF CBB65 dual run capacitor showing 4-inch height and 2.37-inch diameter dimensions for HVAC compatibility.
Air conditioner units showing symptoms for replacement of a 45+5 MFD dual run capacitor.
45+5 uF 370/440 VAC round dual run capacitor with technical specification label visible.
45+5 uF CBB65 round dual run capacitor with aluminum casing and terminal close-up view.
Woman relaxing on a couch under a functioning AC unit, promoting BlueStars DIY HVAC repair solutions.
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45+5 uF MFD 370/440 VAC Round Dual Circular Run Capacitor CBB65 50/60 Hz - For AC Motor Run, Fan Start, Condenser

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CBB65 45+5 uF/MFD 45/5 uF 370 or 440 Volt VAC Round Dual Run Capacitor

Key Features

  • Model: CBB65
  • Type: Dual run capacitor
  • Capacitance: 45 + 5 Microfarads (uF/MFD)
  • Capacitance Tolerance: ±6%
  • Rated Voltage: 370 / 440 Volts AC
  • Frequency: 50 / 60 Hz
  • Operating Temperature Range: -40°C to 70°C (-40°F to 158°F)
  • Shape: Round
  • Dimensions: 2.36 in. Diameter x 3.15 in. Height

Replaces / Cross-Reference Part Numbers

  • Replaces any round or oval dual run capacitor with matching 45/5 uF capacitance and 370V or 440V specifications.
  • Always verify capacitance, voltage, and physical dimensions before purchasing.

Compatibility & Fitment

  • Designed for HVAC applications including air conditioners, heat pumps, and condenser units.
  • Combines two capacitors into one unit to run a compressor motor and a fan motor simultaneously.
  • Three terminals are labeled: HERM (for compressor), FAN (for fan), and C (common line).

When to Replace

  • The outdoor unit's fan is not spinning or turns slowly.
  • The compressor fails to start or struggles to turn on.
  • The A/C unit produces a humming or buzzing noise but does not start.
  • The existing capacitor case is visibly swollen, bulging, or leaking oily fluid.

Installation Tips

  • Disconnect all electrical power to the unit before performing service.
  • Safely discharge the existing capacitor by shorting across the terminals with an insulated screwdriver.
  • Note or photograph the wire connections to the C, HERM, and FAN terminals before removal.
  • Connect the wires to the corresponding terminals on the new capacitor.
  • Secure the new capacitor with the mounting strap or bracket.
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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
Capacitance
‎45 µF + 5 µF (dual)
Voltage Rating
‎370 VAC or 440 VAC dual
Certification
‎UL & cUL, CE, TUV SÜD compliance
Replacement For
‎97F9895, Z97F995, 97F9895BZ3, 27L880, TRCD455, TRCFD455, PRCFD455, 27L889, 97F9851, 97F9851S, 12788, RC0114, Z97F9895, 97F9895, TT-CAP-45/5/440R, HC98KA046, TP-CAP-45/5/440R, CAP050450440RT, HC98JA046, HCKS450D050R440Z, 00662441180262
Dimensions
‎2.36" (6cm) x Height 4.73" (12cm)
Temp Range
‎–25 °C to +70 °C (–13 °F to +158 °F)
SCCR
‎10,000 A fault current rating
Terminals
‎Herm (compressor), Fan (fan), Common
Material
‎Aluminum Case

FAQ

This is a universal replacement capacitor. You can use this part if your existing capacitor has a rating of 45/5 MFD (or 45+5 uF) and a voltage rating of 370 VAC or 440 VAC. It is compatible with any brand of HVAC system, condenser, or AC motor that requires these specific electrical specifications.
Common signs of a failing capacitor include the AC unit failing to start, the fan motor humming but not spinning, or the compressor struggling to engage. If you notice the top of the capacitor is domed or bulging, or if you smell a burnt odor near the electrical panel of your unit, the capacitor is likely faulty and needs replacement.
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; therefore, a 440V unit is a safe and durable upgrade that will function perfectly in a 370V system.
Installation is straightforward and typically takes 15 to 30 minutes. You will need a screwdriver to open the service panel and a pair of needle-nose pliers to disconnect and reconnect the spade terminals. Always ensure the power to the unit is completely shut off at the breaker before beginning.
Before removing the old capacitor, take a photo of the wiring connections to ensure you place the wires back on the correct terminals (HERM, FAN, and C). Most importantly, you must discharge the old capacitor using an insulated screwdriver across the terminals before handling it, as it can hold a dangerous electrical charge even after the power is off.
Capacitors are consumable components that degrade due to heat exposure, electrical surges, and normal wear. Over time, the internal dielectric fluid dries out or breaks down, causing the capacitance to drift outside of the required range, which prevents the motor from receiving the necessary torque to start and run efficiently.