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10 Best Ac Capacitor 2025 in the United States

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Our Top Picks

#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.

The round shape and compact size (2.36 inches in diameter and 3.35 inches in height) make it easy to install in tight spaces. The operating temperature range from -40℃ to +70℃ ensures reliability in extreme conditions, and its compliance with US standards like EIA-456-A and UL listings speaks to its quality and safety.

The polypropylene material adds durability, and it has a safety rating of 10,000 AFC (Available Fault Current), which is a plus for safety-conscious users. However, the 6% tolerance in capacitance might be a consideration for those needing highly precise specifications. Brand reputation is solid, but as with any component, ensuring compatibility with your specific AC model is crucial. This capacitor is a good choice for those looking for a reliable, versatile, and durable component for their AC units.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Brand and Quality
The capacitor got my Tappan gas home furnace running again with no problems. Great value and fit for the money spent.
#2

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

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.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
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.
#3

Upgraded Version 270-324 Mfd uF 110-125VAC Round Motor Start Capacitor 50/60 Hz AC Electric Replacement Part by Blue Stars - Lifetime up to 30.000 Hours

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.

Its broad operating temperature range (-40℃ to 65℃) ensures it can function effectively in diverse environmental conditions, making it versatile for different climates. The high-quality aluminum construction and UL, CE, and TUV certifications ensure durability and adherence to safety standards. Additionally, the lifetime protection guarantee provides peace of mind against potential defects or issues.

Its capacitance tolerance of +/- 20% may not offer the precision required for some highly sensitive applications. While it is well-suited for general motor starting purposes, users needing exact capacitance values might need to look elsewhere. This capacitor is best for those seeking a robust, long-lasting solution for their motors without the necessity for exact capacitance accuracy. The inclusion of multiple replacement compatibility makes it a versatile choice for replacing various start capacitors in the market.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Shape and Size
A little bigger than OEM but fit inside the sheet metal cover. Works perfectly.

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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