[Lifetime Warranty] 50 uF MFD ±5% 370/440 VAC CBB65 Motor Run Round Capacitor
BlueStars 50 uF 370/440 VAC CBB65 round motor run capacitor with terminal connectors.
BlueStars 50 uF 370/440 VAC CBB65 round motor run capacitor with dimensions and certification labels.
Specification chart for 50 uF 370/440 VAC CBB65 round motor run capacitor with technical details.
Top view of 50 uF CBB65 motor run capacitor showing 2-terminal layout and connection labels.
BlueStars 50 uF 370/440 VAC CBB65 motor run capacitor with aluminum case and metalized polypropylene film details.
Educational infographic showing how to select a 50 uF 370/440 VAC CBB65 motor run capacitor.
Technician installing a 50 uF 370/440 VAC CBB65 motor run capacitor in an HVAC condenser unit.
Technician installing a 50 uF 370/440 VAC CBB65 round motor run capacitor in an HVAC unit.
Infographic showing wide range applications for 50 uF motor run capacitor in HVAC and refrigeration systems.
Step-by-step installation guide for 50 uF CBB65 motor run capacitor for AC units.
BlueStars 50 uF 370/440 VAC CBB65 round motor run capacitor with terminal connectors.
BlueStars 50 uF 370/440 VAC CBB65 round motor run capacitor with dimensions and certification labels.
Specification chart for 50 uF 370/440 VAC CBB65 round motor run capacitor with technical details.
Top view of 50 uF CBB65 motor run capacitor showing 2-terminal layout and connection labels.
BlueStars 50 uF 370/440 VAC CBB65 motor run capacitor with aluminum case and metalized polypropylene film details.
Educational infographic showing how to select a 50 uF 370/440 VAC CBB65 motor run capacitor.
Technician installing a 50 uF 370/440 VAC CBB65 motor run capacitor in an HVAC condenser unit.
Technician installing a 50 uF 370/440 VAC CBB65 round motor run capacitor in an HVAC unit.
Infographic showing wide range applications for 50 uF motor run capacitor in HVAC and refrigeration systems.
Step-by-step installation guide for 50 uF CBB65 motor run capacitor for AC units.
Lifetime Warranty

[Lifetime Warranty] 50 uF MFD ±5% 370/440 VAC CBB65 Motor Run Round Capacitor

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50 µF ±5% MFD 370V VAC/440V CBB65 Round Motor Run Capacitor

This high-quality 50 microfarad (µF) motor run capacitor is designed for optimal performance in AC condenser fan motors, including those used in straight cool and heat pump air conditioning systems.

Key Features:

  • Capacitance: 50 µF ±5% tolerance
  • Voltage Rating: 370V AC (up to 440V AC depending on application)
  • Dielectric Type: CBB65, known for reliability and longevity
  • Shape: Round, compact design for easy installation

Benefits:

  • Ensures efficient and reliable operation of your AC unit's fan motor
  • Contributes to optimal cooling or heating performance
  • Compatible with a wide range of units, adhering to local safety standards

Upgrade your air conditioning system with this dependable motor run capacitor, designed to enhance the efficiency and lifespan of your equipment.

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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

A 50 uF motor run capacitor is commonly used on single-phase electric motors in equipment such as air conditioner condensers, heat pumps, air compressors, pool pumps, fans, and some shop equipment. Fitment depends on matching the electrical specifications your original part requires: 50 uF capacitance, a motor run capacitor type, and a voltage rating of 370 or 440 VAC. Always verify the microfarad rating and voltage listed on the old capacitor or on the equipment nameplate before ordering.
Yes, in many cases a 370/440 VAC motor run capacitor can replace a 370 VAC capacitor as long as the capacitance value is the same at 50 uF and the capacitor style fits your equipment. The voltage rating can be equal to or higher than the original, but the microfarad rating should match the original specification.
±5% is the capacitance tolerance. For a 50 uF capacitor, that means the acceptable measured range is about 47.5 to 52.5 uF. If a capacitor tests outside that range, it may be weak or failing and should generally be replaced.
Common signs include a motor that hums but struggles to start, slow starting, overheating, reduced torque, intermittent shutdowns, breaker trips, poor fan or pump performance, or an HVAC condenser fan or compressor that does not run properly. A visibly swollen, leaking, or rust-damaged capacitor is also a strong sign it needs replacement.
This is a motor run capacitor, not a start capacitor. Run capacitors are designed to stay in the circuit while the motor operates and help maintain efficient running torque. Start capacitors are used only briefly during startup and are not interchangeable unless the equipment specifically calls for the same type.
Disconnect power completely before servicing. Capacitors can hold a charge even after power is removed, so discharge the old capacitor using an appropriate safe procedure before touching the terminals. Label or photograph the wire positions, transfer the wires to the new capacitor one at a time, and secure the replacement in the mounting strap or bracket. Typical installation is straightforward for an experienced DIYer or technician and often takes about 10 to 20 minutes, but always follow the equipment wiring diagram.
Confirm three things: the capacitor is a run capacitor, the capacitance is 50 uF, and the voltage rating is 370 or 440 VAC. Also inspect the contactor, motor wiring, terminals, and the motor itself. In HVAC and pump applications, a failed capacitor can be a symptom of a motor drawing excessive current, overheating, or operating with restricted airflow or mechanical drag.
Typical causes include heat, voltage stress, age, vibration, moisture, and long operating hours. In outdoor equipment, high ambient temperatures and weather exposure are common contributors. If a replacement capacitor fails again quickly, check for a failing motor, dirty coils, blocked ventilation, worn bearings, low supply voltage, or loose electrical connections.