45+5 uF 45/5 MFD ±5% 370/440VAC CBB65 Dual Run Round Capacitor - CE cRUus Certified
45+5 uF 370/440VAC CBB65 dual run round capacitor with terminal connectors.
BlueStars 45+5 uF 370/440VAC CBB65 dual run round capacitor with CE, cRUus, and RoHS certification labels.
Dimensional diagram of 45+5 uF dual run round capacitor showing 2.56-inch diameter and 3.74-inch height.
Height comparison chart showing the compact 3.74-inch 45+5 uF dual run capacitor versus the previous 4.73-inch version.
Comparison graphic showing 45+5 uF dual run capacitor installed in an AC cabinet for optimized space and airflow.
Diagram showing minimum required clearance for 45+5 uF dual run round capacitor installation in HVAC cabinet.
Infographic showing technical specifications for a 45+5 uF 370/440VAC CBB65 dual run round capacitor.
Diagram showing terminal connections for C, HERM, and FAN on a 45+5 MFD dual run round capacitor.
Diagram showing construction features of a 45+5 uF dual run round capacitor with aluminum shell and copper lead wires.
Infographic guide for selecting a 45+5 uF 370/440VAC CBB65 dual run round capacitor.
45+5 uF 370/440VAC CBB65 dual run round capacitor with terminal connectors.
BlueStars 45+5 uF 370/440VAC CBB65 dual run round capacitor with CE, cRUus, and RoHS certification labels.
Dimensional diagram of 45+5 uF dual run round capacitor showing 2.56-inch diameter and 3.74-inch height.
Height comparison chart showing the compact 3.74-inch 45+5 uF dual run capacitor versus the previous 4.73-inch version.
Comparison graphic showing 45+5 uF dual run capacitor installed in an AC cabinet for optimized space and airflow.
Diagram showing minimum required clearance for 45+5 uF dual run round capacitor installation in HVAC cabinet.
Infographic showing technical specifications for a 45+5 uF 370/440VAC CBB65 dual run round capacitor.
Diagram showing terminal connections for C, HERM, and FAN on a 45+5 MFD dual run round capacitor.
Diagram showing construction features of a 45+5 uF dual run round capacitor with aluminum shell and copper lead wires.
Infographic guide for selecting a 45+5 uF 370/440VAC CBB65 dual run round capacitor.
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45+5 uF 45/5 MFD ±5% 370/440VAC CBB65 Dual Run Round Capacitor - CE cRUus Certified

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45+5 uF 45/5 MFD ±5% 370/440VAC CBB65 Dual Run Round Capacitor

Key Features

  • Dual run configuration designed for simultaneous compressor motor and fan motor operation.
  • Voltage rating: 370VAC / 440VAC (compatible with both).
  • Capacitance tolerance: ±5%.
  • Operating frequency: 50/60 Hz.
  • Temperature range: -40°C to +70°C (-40°F to +158°F).
  • Construction: CBB65 round metallic casing with standard terminal connections.
  • Safety: CE and cRUus certified.

Replaces / Cross-Reference Part Numbers

  • Replaces all 45/5 MFD/uF 370VAC and 440VAC dual run capacitors.
  • Compatible with common industry part numbers including 97F9895 and other CBB65 specification units with matching capacitance values.
  • Universal replacement for OEM capacitors of the same ratings.

Compatibility & Fitment

  • Suitable for HVAC systems, central air conditioners, heat pumps, and outdoor condenser units.
  • Fits motor run and fan start applications.
  • Verify physical dimensions to ensure clearance within your specific control box housing.

When to Replace

  • Visual signs of failure: Bulging top, leaking oil, or scorched terminals.
  • System failure: The outdoor condenser fan fails to spin or the compressor hums but does not start.
  • Performance decline: Air conditioner struggles to cool or fails to maintain set temperatures.
  • Measured value: When a multimeter indicates the capacitance has drifted outside of the specified ±5% tolerance.

Installation Tips

  • Ensure all power to the HVAC system is disconnected at the circuit breaker before beginning work.
  • Discharge the old capacitor using an insulated screwdriver across the terminals before handling.
  • Take a photo of the existing wire connections to ensure proper placement on the new unit (Common, Herm, and Fan terminals).
  • Ensure terminals are seated securely and connections are tight to prevent arcing.
  • Do not overtighten mounting hardware.

FAQ

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 running slowly or not at all, the capacitor is often the culprit. You may also notice the top of the capacitor is bulging or domed, which is a clear sign of internal failure.
Yes, this capacitor is rated for both 370VAC and 440VAC applications. A capacitor with a higher voltage rating can safely replace one with a lower voltage rating, but you should never replace a 440VAC capacitor with one rated only for 370VAC.
The 45+5 MFD (microfarad) rating indicates this is a dual-run capacitor designed to power two separate motors. The 45 MFD side is intended for the compressor motor, while the 5 MFD side is dedicated to the condenser fan motor.
Replacing a capacitor is a straightforward task that typically takes 15 to 30 minutes. You will generally need a screwdriver to remove the service panel and a pair of needle-nose pliers to disconnect the spade terminals. 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 by touching the terminals before handling it.
Before installation, verify that the power is disconnected and the old capacitor is fully discharged. When connecting the new unit, ensure the wires are firmly seated on the correct terminals: 'HERM' for the compressor, 'FAN' for the fan motor, and 'C' for the common power supply. Taking a photo of the existing wiring configuration before removal is highly recommended to ensure proper reconnection.
Capacitors are heat-sensitive components. Over time, the internal dielectric material degrades due to the high heat generated by the compressor and the ambient outdoor temperature. Frequent power surges and extreme weather conditions can also accelerate this degradation, eventually leading to a loss of capacitance.