10 Best Ac Capacitor 2026 in the United States
#1
Winner
VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
The VEXUNGA 45/5 uF 370/440V Dual Run Start Capacitor is designed for air conditioning units, heat pumps, and condensers. It features a dual run start, meaning it can replace both 370V and 440V capacitors, making it versatile for various applications. With a capacitance of 45/5 microfarads, it fits standard needs for many AC units.
Rating
10.0
Chosen by1,263
Brand and Quality
Most important from
1012 reviews
#2
[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
![[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](https://images-proxy.bestreviews.guide/8kzx8kxRbL7Z7fuqeyKPpxM9X2Q=/0x300/https://m.media-amazon.com/images/I/41p80RWOppL._AC_CX679_.jpg)
The Upgraded Version 270-324 Mfd uF 110-125VAC Round Motor Start Capacitor by Blue Stars is designed to provide reliable performance for electric motors. It offers a wide capacitance range of 270-324 µF and a voltage rating of 110-125V, which is suitable for various motor start applications. The round shape and compact size (36mm x 70mm) make it easy to fit into different devices.
Rating
8.2
Shape and Size
Most important from
1193 reviews
#3
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
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.
Rating
8.2
Capacitance (µF)
Voltage Rating (V)
Brand and Quality
Most important from
3746 reviews
Top 10 Best Ac Capacitor 2026 in the United States
#1
Winner
VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
Capacitance (µF): 45/5
Voltage Rating (V): 370/440
Type (Run or Start): Dual Run Start
Shape and Size: Round, 2.36in diameter, 3.35in height
Temperature Rating: -40℃ to +70℃
Brand and Quality: VEXUNGA
Chosen by 1263 this week
[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
[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
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 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
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 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
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 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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![[2025 Upgraded] BlueStars 2 Packs 35+5 uF 35/5 MFD 370/440VAC Dual Run Round Capacitor, for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool - Replaces 97F9834 Z97F9834](https://images-proxy.bestreviews.guide/Ue51AcRUoktBYjclnWTtAGae9Wc=/0x300/https://m.media-amazon.com/images/I/51Zb2sEIAPL._AC_CX679_.jpg)
[[UL Listed] BlueStars 108-130 uF MFD 110-125 VAC Volts ±20% 50/60 Hz CD60 Round Start Capacitor AC Electric Replacement Part - for Motors Starting or Pool Pump or Well Pump
[[UL Listed] BlueStars 108-130 uF MFD 110-125 VAC Volts ±20% 50/60 Hz CD60 Round Start Capacitor AC Electric Replacement Part - for Motors Starting or Pool Pump or Well Pump
Capacitance (µF): 108-130
Voltage Rating (V): 110-125
Type (Run or Start): start
Shape and Size: Round, 36mm x 70mm
Temperature Rating: -40℃ to +65℃
Brand and Quality: BlueStars, bakelite, 10,000 AFC, warranty
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
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
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
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
Titan HD 45+5MFD, 440/370V, Round Capacitor
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
#10
[UL Recognized] FOCSPROD 35+5 uF 35/5 MFD ±6% 370V/440V CBB65 AC Capacitor, Dual Run Round Capacitor Replacement, 35 5 uF 440 Volt HVAC for AC Unit Fan Motor Start or Heat Pump or Condenser Straight
[UL Recognized] FOCSPROD 35+5 uF 35/5 MFD ±6% 370V/440V CBB65 AC Capacitor, Dual Run Round Capacitor Replacement, 35 5 uF 440 Volt HVAC for AC Unit Fan Motor Start or Heat Pump or Condenser Straight
Capacitance (µF): 35+5 Microfarad
Voltage Rating (V): 370/440 Volts
Type (Run or Start): Run
Shape and Size: Round, 2.44"W x 3.46"H
Temperature Rating: -40°C to +70°C
Brand and Quality: FOCSPROD
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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.