120 uF MFD 370/440 VAC ±5% Round Run Capacitor 50/60 Hz - Fits AC Motor Run, Fan Start, Condenser
120 uF 370/440 VAC round run capacitor with BlueStars label and dual terminal connectors.
Four-step installation guide for 120 uF 370/440 VAC round run capacitor for AC motors and condensers.
Infographic showing two 120 uF 370/440 VAC round run capacitors with signs indicating when to replace an AC capacitor.
BlueStars 120 uF 370/440 VAC round run capacitor for AC motor and condenser units.
BlueStars 120 uF 370/440 VAC round run capacitor with technical specifications and dimensions diagram.
Specification chart for 120 uF 370/440 VAC round run capacitor with technical details and product image.
Top view of 120 uF 370/440 VAC round run capacitor showing 2-terminal layout with C, F, and H/HERM labels.
BlueStars 120 uF 370/440 VAC round run capacitor with aluminum case and metalized polypropylene film construction.
Educational infographic showing how to choose a 120 uF 370/440 VAC round run capacitor for AC and motor applications.
Technician installing a 120 uF 370/440 VAC round run capacitor in an AC condenser unit.
Technician installing a 120 uF 370/440 VAC round run capacitor into an AC condenser unit.
Infographic showing 120 uF run capacitor applications for AC, refrigerator, heat pump, and compressor motor start-up.
120 uF 370/440 VAC round run capacitor with BlueStars label and dual terminal connectors.
Four-step installation guide for 120 uF 370/440 VAC round run capacitor for AC motors and condensers.
Infographic showing two 120 uF 370/440 VAC round run capacitors with signs indicating when to replace an AC capacitor.
BlueStars 120 uF 370/440 VAC round run capacitor for AC motor and condenser units.
BlueStars 120 uF 370/440 VAC round run capacitor with technical specifications and dimensions diagram.
Specification chart for 120 uF 370/440 VAC round run capacitor with technical details and product image.
Top view of 120 uF 370/440 VAC round run capacitor showing 2-terminal layout with C, F, and H/HERM labels.
BlueStars 120 uF 370/440 VAC round run capacitor with aluminum case and metalized polypropylene film construction.
Educational infographic showing how to choose a 120 uF 370/440 VAC round run capacitor for AC and motor applications.
Technician installing a 120 uF 370/440 VAC round run capacitor in an AC condenser unit.
Technician installing a 120 uF 370/440 VAC round run capacitor into an AC condenser unit.
Infographic showing 120 uF run capacitor applications for AC, refrigerator, heat pump, and compressor motor start-up.
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120 uF MFD 370/440 VAC ±5% Round Run Capacitor 50/60 Hz - Fits AC Motor Run, Fan Start, Condenser

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120 uF 370-440VAC Volts ±5% Round Run Capacitor 50/60 Hz AC Electric

Key Features

  • Capacitance: 120 µF
  • Tolerance: ±5%
  • Voltage Rating: 370-440 VAC
  • Frequency: 50/60 Hz
  • Shape: Round
  • Construction: Oil-filled aluminum case
  • Operating Temperature: -40°C to +85°C (-40°F to 185°F)
  • Dual voltage rating replaces both 370 VAC and 440 VAC capacitors.

Replaces / Cross-Reference Part Numbers

  • Replaces any single-run capacitor with matching 120 µF capacitance and 370V or 440V rating.
  • Cross-reference for CBB60 type capacitors with matching specifications.
  • Potential replacement for part number 610807-002.
  • Always verify physical dimensions and terminal type before ordering.

Compatibility & Fitment

  • Air conditioner compressors
  • Condenser fan motors
  • Furnace blower motors
  • Pool and spa pumps
  • General purpose AC electric motors

When to Replace

  • Motor hums but does not start or struggles to start.
  • Fan blades or blower wheel require a manual push to start.
  • Visible signs of damage such as a bulging top, leaking fluid, or corrosion.
  • Capacitance measurement is outside the rated tolerance (±5%).

Installation Tips

  • Disconnect all electrical power to the unit before servicing.
  • Safely discharge the old capacitor by shorting the terminals with an insulated screwdriver.
  • Ensure the µF rating of the new capacitor matches the original part exactly.
  • The voltage rating of the new capacitor must be equal to or greater than the original.
  • Note or photograph the original wire connections before disconnecting.
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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 include the AC unit or motor failing to start, a humming sound coming from the motor without it turning, or the fan requiring a manual push to get moving. If the top of the capacitor is bulging or domed, it has failed and must be replaced immediately.
Yes. A 440 VAC capacitor is rated for a higher voltage than a 370 VAC unit, making it a safe and compatible upgrade. It will function perfectly in a 370 VAC application, provided the microfarad (uF/MFD) rating matches your original part.
Yes. The microfarad rating must match your original capacitor within the ±5% tolerance. Using a capacitor with the wrong uF rating can cause the motor to overheat, run inefficiently, or fail to start entirely.
Always turn off the power to the unit at the disconnect or breaker box before beginning. Capacitors store an electrical charge even when the power is off; use an insulated screwdriver to short across the terminals to discharge any remaining energy before handling the unit.
Installation is generally straightforward and takes about 15 to 30 minutes. You will typically need a screwdriver or nut driver to remove the service panel and a pair of needle-nose pliers to disconnect and reconnect the spade terminals.
Run capacitors are heat-sensitive components. Over time, internal dielectric breakdown occurs due to high ambient temperatures, frequent power surges, or age. Keeping your condenser coils clean and ensuring proper airflow around the unit can help extend the life of your new capacitor.