AC capacitors play a critical role in HVAC systems, motors, appliances and electronics by regulating voltage. Choosing the right capacitor ensures smooth operation and long equipment life. The best AC capacitors feature extended temperature tolerance, low ESR, and safety certifications.
In this guide, we review the top AC capacitors from leading manufacturers like CBB61, Supco, Amrad, and Packard. We compared voltage tolerance, capacitance stability, reliability, and cost to select the best models for HVAC, motors, amplifiers, and power supplies. Whether you need a start/run capacitor or an oval dual capacitor, we have a recommendation for you. Read on for our picks of the 10 best AC capacitors for residential, commercial, and industrial applications in 2023.
TEMCo 7.5 of/MFD 370-440 VAC volts Oval Run Capacitor 50/60 Hz
The high-quality product of the TEMCo 7.5 uf/MFD 370-440 VAC volts Oval Run Capacitor 50/60 Hz replaces OEM single and three-phase motor capacitors. The capacitor is filled with Polypropylene Metallized Film and vegetable oil and contains no PCBs. It operates at 50/60Hz and has a voltage range of 370-440V.
The product comes oval with dimensions of 1.34 x 2.1 inches and a total height of 2.71 inches. It features a heavy-duty aluminum casing with a steel cap, providing 10,000 AFC protection. The capacitor has 1/4 inch Quadruple QCT terminals, with four per post.
Customers have praised the product for its value for money and ease of installation, giving it a rating of 4.7 out of 5. Users have reported that the capacitor has improved the efficiency of their systems, with one customer noting a drop of 3 amps in running efficiency after installation. Other customers have mentioned that the capacitor helped their compressors get up to speed within one second.
The product is sold by TEMCo Industrial and is fulfilled by Amazon. It is part of Amazon’s commitment to empowering small businesses. The product is always in stock and offers fast, same-day shipping from California, ensuring delivery within 2 to 5 days. The product also has a no-hassle 5-year warranty, demonstrating the company’s confidence in its quality.
MAXRUN 60+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor
The MAXRUN 60+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor is crucial for AC air conditioner condensers. It functions similarly to a battery, quickly storing and releasing a significant charge to provide the necessary spin for the motor to start and run correctly. This capacitor is designed to work with electric engines that power the compressors and condensers in air conditioning units.
As the capacitor ages, it gradually loses its ability to hold a charge, which can cause the motor to become louder and seem to run slower. If not replaced in time, the capacitor may become too weak to start the motor, potentially causing the engine to short out. Therefore, timely capacitor replacement is essential for maintaining the air conditioning unit.
The MAXRUN capacitor is rated for 440 volts, meaning it can operate at either 370 or 440 VAC. It can also function in temperatures ranging from -40 C to +70 C. The capacitor is safety-rated at 10,000 AFC. It combines two capacitors into one unit, powering a compressor motor and a fan motor. It features three terminals on the top labeled “Herm” for the compressor motor, “Fan” for the fan, and “C” for the standard line.
This product measures 4 1/3″ tall by 2 3/8″ wide, so measuring the old capacitor is recommended to ensure a correct fit. The MAXRUN capacitor is well-labeled for separate circuits and has plenty of prongs for extra wires. Despite being slightly smaller than some original capacitors, it can be securely fitted with a small shim in the clamp.
The MAXRUN 60+5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor has a 5-year warranty. It is ranked #14,718 in Industrial & Scientific and has received positive customer reviews for its quality and performance. It is recommended to keep a spare on hand when needed.
BOJACK 24Value 630pcs Aluminum Electrolytic Capacitor Assortment Box Kit Range 0.1uF－1000uF
The BOJACK 24Value 630pcs Aluminum Electrolytic Capacitor Assortment Box Kit Range 0.1uF－1000uF is a comprehensive set of high-quality capacitors. The kit includes 630 pieces, offering 24 different values of electrolytic capacitors ranging from 0.1uF to 1000uF. Each capacitor is marked with its value and voltage rating for easy identification and use.
These capacitors are made from aluminum and have a round shape. They operate at 50 volts and have a capacitance of 0.05 Farad. The temperature range for these capacitors is from -40℃ to +105℃, with a tolerance of ±20%, making them stable and durable for long-term use.
The capacitors are widely used in power supplies and interconnecting stages of amplifiers at audio frequencies. They are also suitable for DIY work, repairs, and small projects and can be used to repair TVs, LCD monitors, radios, stereos, game consoles, microwaves, etc.
The kit comes well-packed in a plastic box with clearly labeled compartments to prevent the parts inside from sliding or moving around. The package dimensions are 9.45 x 6.57 x 1.02 inches, weighing 5.93 ounces. The item model number is BJ-CPT24-630, and it was first available on March 3, 2019. The manufacturer is BOJACK, and the ASIN is B07PBQXQNQ. As of the article date of August 12th, 2023, it ranks #8,048 in Industrial & Scientific on the best sellers list.
One customer review highlighted the effectiveness of these capacitors in transforming a non-working radio into a fully functional one without any additional tuning or modifications. However, as of now, the product’s stock status is unknown.
MAXRUN 50+5 MFD uf 370 or 440 Volt VAC Round Dual Run Capacitor for Air Conditioner or Heat Pump Condenser
The MAXRUN 50+5 MFD uf 370 or 440 Volt VAC Round Dual Run Capacitor is a high-quality product for air conditioners or heat pump condensers. Manufactured in China by MaxRun Capacitors, this device is ranked #10,766 in the Industrial and scientific category.
The capacitor measures 3 15/16” tall and 2 5/16″ wide, and it’s crucial to measure the old capacitor to ensure a correct fit. It operates at 440 volts, functioning at either 370 or 440 VAC and running from -40 C to +70 C. The safety rating of this product is 10,000 AFC.
This dual-run capacitor combines two capacitors into one unit, powering a compressor motor and a fan motor. It features three terminals on the top labeled “Herm” for the compressor motor, “Fan” for the fan, and “C” for the standard line.
The MAXRUN capacitor functions like a battery, quickly storing and releasing a significant charge to provide the necessary spin for the motor to start and run correctly. As the capacitor ages, it may weaken, causing the engine to become louder and slower. Timely replacement of the capacitor can extend the motor’s life and prevent it from shorting out.
The product comes with a 5-year warranty and offers free returns for any reason in new and unused condition. It was first available on February 25, 2018, and has a model number of MR-50/5/440-R. The package dimensions are 3.94 x 2.56 x 2.52 inches, weighing 9.91 ounces.
Customers have praised the company’s customer service, noting that they received refunds without question when issues arose. However, it’s recommended always to have a spare capacitor handy for when replacement is needed.
BOJACK 7.5 uF ±6% 7.5 MFD 370V/440V CBB65 Oval Run Start Capacitor
The BOJACK 7.5 uF ±6% 7.5 MFD 370V/440V CBB65 Oval Run Start Capacitor is a highly rated product recognized by Amazon’s Choice in the category of Industrial Electrical Capacitors. This capacitor is designed for AC Motor Run, Fan Start, and Cool or Heat Pump Air Conditioner applications. It operates at 440 volts and has a capacitance of 7.5 microfarads. The product is made from durable materials such as aluminum and polypropylene, ensuring its longevity and reliability.
This oval-shaped capacitor can operate within a temperature range of -40 ℃ to +70 ℃ or -104℉ to +158℉, making it suitable for various environments. It is engineered for safety with UL recognition and features a 10,000 AFC Anti Explosion Pressure Switch. This product is also a replacement for several models, including 27L566BZ3, 27L566, 27L566S, 97F9001, Z97F9001, 97F9001BX, CPT-00120, TP-CAP-7.5/440, and TOCF7.5.
The BOJACK 7.5 uF Capacitor has received positive customer reviews, with many praising its easy installation process, fast delivery, and effectiveness in solving HVAC blower motor issues. It is sold by BOJACK ELECTRON and fulfilled by Amazon, ensuring reliable shipping and customer service. The product also has a free return policy, allowing customers to return the item in new and unused condition without shipping charges.
PowerWell 45+5 MFD 45/5 of 370 or 440 Volt Dual Run Round Capacitor PW-45/5/R
The PowerWell 45+5 MFD 45/5 of 370 or 440 Volt Dual Run Round Capacitor PW-45/5/R is an electrical component designed for extensive air conditioning or heat pump units. This dual-run capacitor supports two electric motors, specifically a fan motor and a compressor motor, thereby saving space by combining two capacitors into one case. The capacitor has three terminals labeled “C,” “FAN,” and “HERM,” representing the Common, Fan, and Hermetically sealed compressor, respectively.
This product comes in various sizes depending on the capacitance (µF or MFD) and voltage. It’s important to note that a 440-volt capacitor can replace a 370-volt one due to its superior build, but the reverse isn’t advisable as it could lead to premature failure. The capacitance must remain within 10%+ or 5%- of its original value. For instance, a 50 µF capacitor can be replaced with a 47.5 to 55 µF capacitor with the same or better voltage ratings.
The round cylinder-shaped design of this dual-run capacitor makes it suitable for air conditioning systems, aiding in the starting of the compressor and the condenser fan motor. It can substitute an oval-shaped capacitor with the same MFD and Volt specifications.
The product is EIA-456-A approved, making it suitable for the US market. However, some users have reported that the capacitor did not resolve their issues, suggesting that other components, like the centrifugal cut-out switch on the electric motor, might have failed. Despite costing about twice as much as some other capacitors, the PowerWell 45+5 MFD 45/5 of 370 or 440 Volt Dual Round Capacitor PW-45/5/R is guaranteed to last 5 years.
The product was first available on February 1, 2017, and is manufactured by PowerWell. It ranks #17,614 in Industrial and scientific and #133 in Industrial Electrical Capacitors. The product comes with free returns for any reason in new and unused condition.
EEEEE 30 Value 300 pcs Multilayer Monolithic Ceramic Capacitor Assortment kit 10pf－10uF
The E 30 Value 300 pcs Multilayer Monolithic Ceramic Capacitor Assortment kit 10pf－10uF is a comprehensive set of ceramic capacitors. The kit, priced at $9.99, has 300 capacitors housed in its box. However, it’s important to note that the values are not printed on the capacitors themselves, so a capacitor meter may be necessary for precise measurements.
The product has been noted for its value, even though 80% of the measured values were low by 10% or more. Despite this, customers tend to retain this item, which has fewer returns than average compared to similar products. This suggests a high level of customer satisfaction.
The capacitors are made from ceramic material and are designed for door mount installation. The total cost, including AmazonGlobal Shipping, comes to $17.92, with no additional import fees. Businesses can also benefit from special pricing and up to 10% off recurring deliveries if they register a free business account with Amazon.
The E brand’s capacitor kit was listed on Amazon on July 13th, 2023. This product offers a wide range of reasonably priced capacitors, making it a popular choice among customers.
5 MFD Capacitor 370 or 440 VAC 5uf Oval Run Capacitor
The HVAC Genius 5 MFD AC Capacitor is an oval-shaped run capacitor designed for air conditioning and heat pump systems. It helps start the compressor and condenser fan motor. The capacitor has a capacitance of 5 microfarads (MFD) with a tolerance of ±5%. It is rated for 370VAC or 440VAC.
This run capacitor replaces old capacitors in air conditioner condenser units and heat pumps to get the fan and compressor motors running again. It can be used in straight excellent air conditioners, heat pumps, AC fan motors, and other equipment needing a 5μF oval run capacitor rated for 370 or 440 volts.
The oval capacitor measures approximately 2.36 x 1.97 x 0.79 inches and weighs 2.89 ounces. It is made in China by The HVAC Genius. Reviews mention it as an exact replacement fitting into existing capacitor brackets. The capacitor stores high voltage, so care should be taken when handling it. It provides an inexpensive solution for starting and running AC, heat pump fan, and compressor motors.
PowerWell 70+7.5 MFD of 370 or 440 Volt VAC Round Motor Dual Run Capacitor for AC Air Conditioner Condenser
The PowerWell 70+7.5 MFD uf 370 or 440 Volt VAC Round Motor Dual Run Capacitor is a high-quality product designed for AC Air Conditioner Condensers. This round-shaped capacitor operates at a maximum voltage of 440 volts and is built to meet the most demanding USA standards for AC motor-run capacitors, including EIA-456-A and IEC 60252-1:2001.
The product dimensions are 2-1/2″ in diameter and 5″ tall, and it can operate within a temperature range of -40 C to +70 C (-40F to 158F). This capacitor can replace 370 and 440 VAC capacitors, making it a versatile choice for various AC units.
The PowerWell capacitor has received positive customer reviews, with an average rating of 4.7 out of 5 based on 269 global ratings. Customers have praised its affordability, price of less than $20, and easy installation process. Many users have found it a cost-effective solution for fixing their AC units, saving them from expensive service calls.
This product is sold on Amazon Business, where businesses can avail of special pricing and up to 10% off on recurring deliveries by registering a free business account. The product is guaranteed to last five years, reflecting the manufacturer’s confidence in its durability and quality.
EEEEE 0.1uF－2200uF capacitors 20 Value 304pcs Individual Box Lid Electrolytic Capacitor Assortment kit
The E 0.1uF－2200uF capacitors 20 Value 304pcs Individual Box Lid Electrolytic Capacitor Assortment kit is a comprehensive set of capacitors designed for industrial electrical and Arduino applications. The kit is highly appreciated for its well-organized, color-coded system. It makes it easy to find the right components and saves time by providing essential information such as physical size, voltage rating, and diode types.
The kit comes in individual boxes with lids labeled with detailed specifications, eliminating the need to refer to data sheets constantly. This feature mainly benefits those working on projects requiring various components, as it simplifies finding the correct piece.
In addition to the capacitors, the company also offers other kits, all praised for their high-quality components and excellent organization. The user wants the company to expand this product line with more prominent, robust organizers.
The E capacitor assortment kit is not just a collection of components; it’s a tool that enhances efficiency and productivity. It’s an ideal choice for seasoned professionals who already own these components and newcomers to the field who want to focus more on assembling and soldering circuits rather than searching for the right parts.