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Ac Capacitor

10 Best Ac Capacitor 2026 in the United States

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Slide 1

BlueStars

[2025 Updated] BlueStars 10 uF MFD ±5% 370/440V CBB65 Oval Run Start Capacitor Replacement Part - Fit for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditioner

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#1

Winner

10.0  score
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VEXUNGA

VEXUNGA 7.5uF 370/440VAC 50/60Hz CBB65 CBB65A Oval Run Start Capacitor 7.5 MFD 370V/440V Air Conditioner Capacitors for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool

Capacitance (µF): 7.5 Microfarad
Voltage Rating (V): 370/440V
Shape and Size: Oval, 2.17 x 2.17 x 2.03
Temperature Rating: -40℃ to +70℃
Brand and Quality: VEXUNGA

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Chosen by 1130 this week

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Slide 1

BlueStars

[2025 Updated] BlueStars 10 uF MFD ±5% 370/440V CBB65 Oval Run Start Capacitor Replacement Part - Fit for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditioner

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#2
9.7  score
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BOJACK

BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

Capacitance (µF): 45+5
Voltage Rating (V): 370V/440VAC
Type (Run or Start): Dual Run
Shape and Size: Round, 65 mm diameter, 95 mm
Temperature Rating: -40℃ to +70℃
Brand and Quality: BOJACK

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#3
9.7  score
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BOJACK

BOJACK 35+5uF 35 5 MFD ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

Capacitance (µF): 35+5
Voltage Rating (V): 370V/440V
Type (Run or Start): Dual Run
Shape and Size: Round, Diameter <1.97 inch
Temperature Rating: -40℃ to +70℃
Brand and Quality: BOJACK

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#4
9.7  score
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SUREPHON

SUREPHON 45+10 uF 45/10 MFD ±5% 370V/440VAC Dual Run Start Capacitor CBB65B Works for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

Capacitance (µF): 45+10
Voltage Rating (V): 370-440
Type (Run or Start): dual run/start
Shape and Size: Round, 2.5" dia x 4.13" height
Temperature Rating: -40°C to 70°C
Brand and Quality: SUREPHON, UL certified, meets standards

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#5
9.1  score
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QYCKFIXR

QYCKFIXR AC Capacitor 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for Heat Pump Air Conditioner，Ten Years of Coverage

Capacitance (µF): 45+5 µF
Voltage Rating (V): 370V to 440VAC
Type (Run or Start): dual run and start
Shape and Size: Round, 2.5in diameter, 4in tall
Temperature Rating: -40℃ to +70℃
Brand and Quality: QYCKFIXR

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#6
8.8  score
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BlueStars

[UL Certified] BlueStars 270-324 uF MFD 110-125 VAC Round Motor Start Capacitor 50/60 Hz AC Electric Replacement Part for AC Motors Starting or Pool Pump or Well Pump

Capacitance (µF): 270-324 µF
Voltage Rating (V): 110-125V
Type (Run or Start): Start
Shape and Size: Round, 36mm x 70mm
Temperature Rating: -40℃ to 65℃
Brand and Quality: Blue Stars, high-quality aluminum

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#7
8.5  score
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BOJACK

BOJACK 40+5 uF 40/5 MFD ±6% 370V/440 VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

Capacitance (µF): 40+5
Voltage Rating (V): 370V/440V
Type (Run or Start): Run
Shape and Size: Round, 2.36in diameter, 3.55in height
Temperature Rating: -40℃ to +70℃
Brand and Quality: BOJACK

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#8
8.5  score
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BlueStars

[UL Listed] BlueStars 189-227 uF MFD 220-250 VAC Volts Round Start Capacitor 50/60 Hz AC Electric - Lot -1 - for Electric Motor, OEM Single Phase Motor Capacitors - Lifetime Up to 30.000 Hours

Capacitance (µF): 189-227
Voltage Rating (V): 220-250
Type (Run or Start): Start
Shape and Size: Round, 1.4 x 3.4 inches
Temperature Rating: -40°F to 149°F
Brand and Quality: BlueStars, UL listed, lifetime warranty

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7% OFF
#9
7.3  score
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BOJACK

BOJACK 70+5uF 70/5MFD ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight Cool or Heat Pump air Conditioner

Capacitance (µF): 70+5
Voltage Rating (V): 370V/440V
Type (Run or Start): Dual Run
Shape and Size: Cylindrical, 2.56 x 4.92 inches
Temperature Rating: -40℃ to +70℃
Brand and Quality: BOJACK

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#10
7.0  score
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Packard

Titan HD 45+5MFD, 440/370V, Round Capacitor

Capacitance (µF): 45+5
Voltage Rating (V): 440/370
Shape and Size: Round, 4.8 x 2.32 x 2.13
Brand and Quality: Packard

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9% OFF
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#1

Winner

VEXUNGA 7.5uF 370/440VAC 50/60Hz CBB65 CBB65A Oval Run Start Capacitor 7.5 MFD 370V/440V Air Conditioner Capacitors for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool

10.0  score

VEXUNGA 7.5uF 370/440VAC 50/60Hz CBB65 CBB65A Oval Run Start Capacitor 7.5 MFD 370V/440V Air Conditioner Capacitors for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool

VEXUNGA

10.0  score

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Rating
10.0
Chosen by1,130
Capacitance (µF)
Type (Run or Start)

Most important from
433 reviews

Capacitance (µF)
Solved the issue with my pool heater's blower motor. This capacitor works fine and is easy to match with the motor's Farad rating.
Type (Run or Start)
Perfect fit and value for replacing the run capacitor in my Tappan gas home furnace. It works flawlessly.

The VEXUNGA 7.5uF 370/440VAC capacitor is designed for air conditioner units, pool pumps, and air condensers. It offers a capacitance of 7.5 microfarads and supports both 370V and 440V, making it versatile for different AC units. The capacitor is an oval shape, measuring 2.17 x 2.17 x 2.03 inches and weighs 3.21 ounces. Made of polypropylene and aluminum, it promises durability and reliability.

With an operating temperature range from -40℃ to +70℃, it can withstand various environmental conditions. Being compliant with stringent US standards and UL & CUL listed ensures it meets high safety and quality benchmarks. This capacitor is especially suitable for those looking to replace capacitors like the 27L566 and others mentioned in its compatibility list.

The VEXUNGA capacitor stands out for its flexibility, safety compliance, and durability, making it a solid choice for those in need of a reliable AC capacitor.

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Rating
10.0
Chosen by1,130
Capacitance (µF)
Type (Run or Start)

Most important from
433 reviews

Capacitance (µF)
Solved the issue with my pool heater's blower motor. This capacitor works fine and is easy to match with the motor's Farad rating.
Type (Run or Start)
Perfect fit and value for replacing the run capacitor in my Tappan gas home furnace. It works flawlessly.
#2

BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

9.7  score

BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

BOJACK

9.7  score

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Rating
9.7
Capacitance (µF)
Voltage Rating (V)
Brand and Quality

Most important from
3766 reviews

Capacitance (µF)
The 45/5 MFD capacity was an exact match for my old capacitor, and the ±6% tolerance gave me confidence in its quality.
Voltage Rating (V)
With the 370V/440VAC rating, it handled the demanding workload with grace.
Brand and Quality
The BOJACK capacitor truly saved the day by bringing my AC back to life during the hottest week of the year.

The BOJACK 45+5 uF 370V/440V CBB65 Dual Run Circular Start Capacitor is a versatile option that can be used for AC motor run, fan start, or condenser applications. With a capacitance of 45+5 µF and a voltage rating of 370V/440VAC, this capacitor is designed to handle a range of applications. The dual run feature is beneficial for those needing a start and run capacitor in one, simplifying installation and reducing the need for multiple components.

Its round shape and relatively compact size (65 mm diameter and 95 mm height) make it suitable for various installations without taking up much space. The capacitor is made from polypropylene, which is known for its durability and reliability. Additionally, it operates efficiently within a wide temperature range of -40℃ to +70℃, making it suitable for various environmental conditions. The safety rating of 10,000 AFC adds an extra layer of reliability and security.

The ±6% tolerance might be a bit high for applications needing very precise capacitance values. While BOJACK is a decent brand, it may not be as well-known or trusted as some other leading brands in the market. This could be a factor for users looking for the highest quality components. This capacitor is a good choice for general AC motor, fan, and condenser applications, offering a good balance of performance and versatility at a reasonable price.

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Rating
9.7
Capacitance (µF)
Voltage Rating (V)
Brand and Quality

Most important from
3766 reviews

Capacitance (µF)
The 45/5 MFD capacity was an exact match for my old capacitor, and the ±6% tolerance gave me confidence in its quality.
Voltage Rating (V)
With the 370V/440VAC rating, it handled the demanding workload with grace.
Brand and Quality
The BOJACK capacitor truly saved the day by bringing my AC back to life during the hottest week of the year.
#3

BOJACK 35+5uF 35 5 MFD ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

9.7  score

BOJACK 35+5uF 35 5 MFD ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

BOJACK

9.7  score

Check price

Rating
9.7
Capacitance (µF)
Type (Run or Start)
Shape and Size

Most important from
2401 reviews

Capacitance (µF)
Replacing the capacitor with the BOJACK 35+5uF Dual Run Capacitor saved me over $60. It's been working flawlessly, and my AC unit runs smoothly and efficiently.
Type (Run or Start)
Replacing the capacitor with the BOJACK 35+5uF Dual Run Capacitor saved me over $60. It's been working flawlessly, and my AC unit runs smoothly and efficiently.
Shape and Size
This capacitor was smaller than the unit it replaced, requiring a mounting bracket adjustment, but it worked great after installation.
Brand and Quality
The capacitor arrived well-packaged, was easy to install, and is built with solid quality. Despite the lower cost, it performs just as well as more expensive options.

The BOJACK 35+5uF 35 5 MFD ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor is a versatile component designed for AC motors, fans, and condensers. One of its main strengths is its dual run capability, making it suitable for both motor run and fan start applications. The capacitance of 35+5 microfarads ensures it can handle a range of power requirements, while the voltage rating of up to 440V offers robust performance for most residential and commercial HVAC systems.

Additionally, it's built with polypropylene material, known for durability and high-temperature resistance, supporting an operating range from -40℃ to +70℃. This makes it reliable in various climates and conditions. The safety rating of 10,000 AFC indicates good protection against electrical faults, adding peace of mind regarding its longevity and reliability. The compact dimensions (Diameter <1.97 inch, Height <4.14 inch) mean it can fit comfortably in tight spaces, a plus for installations with limited room.

A potential drawback is the ±6% tolerance, which might not be precise enough for highly sensitive applications needing exact capacitance values. The brand, BOJACK, while not as renowned as some premium brands, generally receives positive feedback for quality and performance in the industrial and scientific sectors. This capacitor is well-suited for homeowners and technicians looking for a cost-effective and reliable solution for AC motor and fan applications.

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Rating
9.7
Capacitance (µF)
Type (Run or Start)
Shape and Size

Most important from
2401 reviews

Capacitance (µF)
Replacing the capacitor with the BOJACK 35+5uF Dual Run Capacitor saved me over $60. It's been working flawlessly, and my AC unit runs smoothly and efficiently.
Type (Run or Start)
Replacing the capacitor with the BOJACK 35+5uF Dual Run Capacitor saved me over $60. It's been working flawlessly, and my AC unit runs smoothly and efficiently.
Shape and Size
This capacitor was smaller than the unit it replaced, requiring a mounting bracket adjustment, but it worked great after installation.
Brand and Quality
The capacitor arrived well-packaged, was easy to install, and is built with solid quality. Despite the lower cost, it performs just as well as more expensive options.

Buying Guide for the Best Ac Capacitor

When choosing an AC capacitor, it's important to understand the role it plays in your air conditioning system. The capacitor stores and releases electrical energy to help start and run the compressor and fan motor. Selecting the right capacitor ensures your AC unit operates efficiently and reliably. Here are the key specifications to consider when picking an AC capacitor and how to navigate them to find the best fit for your needs.
Capacitance (µF)Capacitance, measured in microfarads (µF), indicates the amount of electrical charge the capacitor can store. This is crucial because the correct capacitance ensures your AC unit's motor starts and runs properly. Capacitors typically range from 5 µF to 80 µF. To choose the right capacitance, check the specifications of your AC unit or the old capacitor. Using a capacitor with the wrong capacitance can lead to inefficient operation or damage to the motor.
Voltage Rating (V)The voltage rating of a capacitor indicates the maximum voltage it can handle. This is important to ensure the capacitor can withstand the electrical load of your AC unit. Common voltage ratings are 370V and 440V. It's generally safe to use a capacitor with a higher voltage rating than required, but never use one with a lower rating. Check your AC unit's specifications or the old capacitor to determine the correct voltage rating.
Type (Run or Start)There are two main types of AC capacitors: run capacitors and start capacitors. Run capacitors are used to maintain a constant charge to the motor while it's running, while start capacitors provide a boost of energy to start the motor. Run capacitors are typically rated for continuous duty, while start capacitors are rated for short-term use. Determine which type your AC unit requires by consulting the unit's specifications or the old capacitor.
Shape and SizeAC capacitors come in various shapes and sizes, including round and oval. The physical size and shape are important to ensure the capacitor fits in the designated space within your AC unit. Measure the dimensions of the old capacitor or the space where it will be installed to ensure a proper fit. While the shape doesn't affect performance, it must match the space available in your unit.
Temperature RatingThe temperature rating of a capacitor indicates the range of temperatures it can safely operate within. This is important for ensuring reliable performance in different environmental conditions. Capacitors typically have a temperature rating of -40°C to +70°C or higher. Choose a capacitor with a temperature rating that matches or exceeds the conditions in which your AC unit will operate, especially if you live in an area with extreme temperatures.
Brand and QualityThe brand and quality of the capacitor can affect its reliability and lifespan. High-quality capacitors from reputable brands are more likely to provide consistent performance and last longer. Research different brands and read reviews to find a reliable capacitor. While it might be tempting to choose a cheaper option, investing in a high-quality capacitor can save you from future repairs and replacements.

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