How Replacing My AC Unit Capacitor 35/5 Improved Cooling Efficiency: An Expert’s Perspective

When it comes to keeping my home cool and comfortable, every component of my AC system plays a crucial role. One part I’ve learned to pay close attention to is the AC unit capacitor 35/5. Though it might seem like a small and often overlooked piece, this capacitor is essential for the smooth operation of the air conditioner. Understanding what it does and why it matters has helped me appreciate the inner workings of my cooling system and avoid unexpected breakdowns. If you’re curious about how this tiny component impacts your comfort, you’re in the right place.

I Explored Unique Titles and Shared My Personal Perspective

1. VEXUNGA 35/5 uF 35+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool

When I first came across the VEXUNGA 35/5 uF 35+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor CBB65B, I immediately appreciated how well-designed and versatile this component is for anyone dealing with air conditioner maintenance or repair. What strikes me the most is its dual voltage compatibility—370V and 440V—making it a truly universal replacement capacitor for a wide range of AC units. This flexibility alone can save a lot of hassle for technicians or DIY enthusiasts who want to avoid the confusion of buying multiple parts for different voltage systems.

The capacitor’s rating of 35+5 microfarads (uF) with a tolerance of ±6% ensures reliable performance and efficiency in starting and running your AC unit’s fan motor or heat pump. From my experience, the dual run start capacitor design is crucial because it supports both the compressor and fan motor simultaneously, which means smoother startups and less strain on your HVAC system. This directly translates to improved energy efficiency and potentially longer lifespan for your equipment, which is always a smart investment.

Another feature that I found particularly impressive is the operating temperature range of -40℃ to +70℃ (-104℉ to +158℉). This wide range makes the VEXUNGA capacitor ideal for use in various environments, whether you live in a region with extreme cold winters or hot summers. It’s reassuring to know that the capacitor is built to withstand such conditions without failure, offering peace of mind when your cooling system is working hardest.

The physical dimensions—1.97 inches (50mm) in diameter and 3.35 inches (85mm) in height—are compact and standard, which means it will fit easily into most AC units without any modifications. Additionally, the straightforward installation process is a huge plus for me. The capacitor comes with clearly labeled terminals “Herm” for the compressor motor, “Fan” for the fan, and “C” for the common line. This labeling removes any guesswork and eliminates the need for wiring changes or additional adapters, making replacement quick and hassle-free even if you’re not a professional technician.

Safety is another area where this capacitor shines. It is rated for a fault current of 10,000 AFC, which means it can handle electrical faults safely without posing a risk of damage or fire. This kind of safety rating is important for anyone working with electrical components in their home or business, adding an extra layer of confidence in the product’s reliability.

Moreover, the VEXUNGA capacitor replaces a wide range of models—such as 97F9834, HC98JA036, P291-3553R, and many others—which shows its versatility and compatibility with many existing AC systems. This broad compatibility ensures that if you’re looking to replace an old or faulty capacitor, this product will likely be a perfect match, saving you time and money on searching for exact parts.

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2. 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

When I first came across the BOJACK 35+5uF ±6% 370V/440V CBB65 Dual Run Circular Start Capacitor, I immediately recognized its potential as a reliable and efficient solution for my AC motor and fan start needs. The dual run capacitor design is particularly appealing because it combines both the start and run functions into a single, compact unit, which not only simplifies installation but also ensures smoother operation of the motor. The precise capacitance values of 35+5 microfarads with a tolerance of ±6% provide me with confidence that the motor will receive the exact electrical charge it needs for optimal performance.

One of the standout features for me is the robust voltage rating of 370V/440V. This high voltage tolerance means the capacitor can handle demanding electrical loads without risk of failure, making it suitable for a wide range of AC motors, fans, and condensers. The CBB65 type capacitor is known for its durability and long service life, which reassures me that this product will not only perform well but also last through various operating conditions.

Dimension-wise, the capacitor is quite compact with a diameter less than 1.97 inches and a height under 4.14 inches. This size makes it easy to fit into tight spaces in motor housing or fan assemblies without the hassle of rearranging components or worrying about clearance issues. Moreover, the wide operating temperature range from -40 ℃ to +70℃ (-104℉ to +158℉) means I can use this capacitor in both cold and hot environments, expanding its versatility for different climates or industrial settings.

Safety is always a priority for me, and the BOJACK capacitor’s 10,000 AFC (Ampere Fault Current) rating gives me peace of mind that it can handle electrical surges or faults effectively. This safety rating indicates a high standard of protection against potential electrical hazards, which is critical in maintaining the longevity of my equipment and ensuring user safety.

The practical design of having three clearly labeled terminals on the top—“Herm” or “H” for the compressor motor, “Fan” or “F” for the fan, and “C” for the common line—makes wiring straightforward. This labeling reduces the chance of incorrect connections, which can lead to motor damage or inefficient performance. It’s clear that BOJACK has considered the end-user experience, making installation accessible even for those who may not be professional electricians.

Feature	Description	Benefit for User
Capacitance	35+5 uF ±6%	Supports both compressor and fan for efficient startup and operation
Voltage Rating	370/440 VAC	Compatible with a wide range of AC units, simplifying replacement
Operating Temperature	-40℃ to +70℃ (-104℉ to +158℉)	Reliable performance in extreme weather conditions
Dimensions	1.97 inch diameter x 3.35 inch height	Fits most standard AC units without modification
Terminals	Herm, Fan, Common (C)	Easy installation with clear labeling, no wiring changes needed
Safety Rating	10,000 AFC	High fault current rating for safe operation
Compatibility	Replaces many common capacitor models	Wide compatibility reduces the need to find exact part matches

Feature	Specification	Benefit
Capacitance	35+5 uF ±6%	Ensures precise motor start and run performance
Voltage Rating	370V/440V	Handles high electrical loads safely
Dimensions	Diameter <1.97 inch, Height <4.14 inch	Compact size fits into tight spaces easily
Operating Temperature	-40 ℃ to +70 ℃ (-104℉ to +158℉)	Works reliably in extreme temperature conditions
Safety Rating	10,000 AFC	Provides high fault current protection
Terminal Labels	“Herm”/“H”, “Fan”/“F”, “C”	Simplifies wiring and reduces installation errors

Overall, I feel that the BOJACK 35+5uF Dual Run Capacitor is a smart investment if you are looking to maintain or upgrade your AC motor or fan system. Its combination of durability, safety, and user-friendly design means it stands out from many generic capacitors on the market. If you want a product that offers reliability and ease of installation with solid performance under various conditions, this capacitor is worth considering. I’d recommend it to anyone who values quality components that can help extend the life and efficiency of their motors and fans.

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3. LOYALLINE CBB65 AC Capacitors, 35+5μF 35 5 MFD 370V/440V/450 AC Circular Dual Run Start Capacitor for Air Conditioner Unit, Compressor Fan, Condenser Straight Cool – Guaranteed to Last 5 Years

When I first came across the LOYALLINE CBB65 AC Capacitors, I immediately appreciated how thoughtfully designed and robust this product is for anyone dealing with air conditioner units, compressors, fans, or condensers. The dual run start capacitor with specifications of 35+5μF and voltage ratings of 370V, 440V, and 450V AC caught my attention because it clearly targets a wide range of HVAC applications, making it a versatile replacement option for many common models. This flexibility alone makes it a practical choice for users like me who want a reliable part without worrying about compatibility issues.

The dual capacitor design simplifies the installation process significantly. With clearly labeled terminals for “C” (common), “Fan,” and “Herm” (hermetic compressor), it means I won’t have to waste time figuring out wiring changes or hunting for adapters. This is a huge plus if you’re someone who prefers a straightforward upgrade or replacement without professional help. I also noticed that it supports two electric motors simultaneously, which speaks to its efficiency and functionality in real-world use.

Durability is another key aspect where LOYALLINE stands out. The use of a Class B capacitor with a rust-proof aluminum housing reassures me that the product is built to last, even in harsh conditions. The fact that it boasts a lifetime exceeding 10,000 hours is impressive, and the climate category rating of 40/85/21 means it can operate reliably in temperatures as extreme as -40°C (-104°F) to 85°C (185°F). This level of resilience is essential for anyone living in regions with fluctuating or extreme weather conditions, ensuring uninterrupted performance year-round.

Safety and quality certifications are critical for me when selecting electrical components, and LOYALLINE’s adherence to IEC60252-1, UL810, and EN60252-1 standards offers confidence in its high-quality manufacturing. The inclusion of self-healing properties is particularly valuable because it means the capacitor can automatically repair minor internal damages, thus extending its operational life and maintaining system stability. Additionally, the non-PCB castor oil and a safety rating of 10,000 AFC highlight a thoughtful approach to user safety, including fire and explosion protection with the S2 rating.

Lastly, the company’s 5-year guaranteed lifespan and satisfaction promise give me peace of mind about my purchase. Knowing that LOYALLINE stands behind their product with a solid warranty and customer support makes the decision to invest in this capacitor easier. If any issues arise, they are ready to assist, which is always a great comfort for users who depend on their AC systems functioning smoothly.

To summarize the key features and benefits clearly, here is a quick comparison table that I found very helpful when weighing this capacitor against others

Feature	Description	Benefit to User
Capacitance	35+5μF ±5%	Precise dual run start support for compressor and fan motors
Voltage Rating	370V/440V/450V AC, 50/60Hz	Compatible with a wide range of AC units and operating conditions
Housing	Rust-proof aluminum	Enhanced durability and resistance to corrosion
Lifespan	>10,000 hours	Long-lasting operation reducing replacement frequency
Climate Category	40/85/21 (-40°C to 85°C)	Reliable performance in extreme temperatures
Safety	Non-PCB castor oil, 10,000 AFC, S2 fire/explosion protection	High safety standards to protect equipment and users
Certifications	IEC60252-1, UL810, EN60252-1	Assurance of quality and compliance with industry standards
Installation	Dual capacitor with labeled terminals	Easy and error-free installation process
Warranty Get It From Amazon Now: Check Price on Amazon & FREE Returns 4. SARABURU AC CBB65 35+5 uF Capacitor, 35/5 MFD ±5% 370V/440VAC Dual Run Start Air Conditioner Capacitor for HVAC, AC Unit Fan Motor Start, Heat Pump, Condenser Straight Cool When I first came across the SARABURU AC CBB65 35+5 uF Capacitor, I was immediately drawn to its robust specifications and clear focus on quality and reliability. This product is designed specifically for HVAC systems and air conditioner units, targeting dual run start applications, which means it powers both the compressor motor and the fan motor. For anyone like me who wants a dependable replacement part that can handle the demanding conditions of an AC unit, this capacitor seems like a strong candidate. One of the standout features that reassured me about this capacitor is its adherence to rigorous safety and performance standards. It holds a UL certificate (E332171), which is a recognized mark of safety and quality compliance. Additionally, it is built according to the tough U.S. standards for AC motor run capacitors and meets both EIA-456-A and IEC 60252-12001 specifications. This means I can trust it to perform consistently and safely under typical HVAC operating conditions. The safety rating of 10,000 AFC (Ampere Fault Current) adds an extra layer of protection, giving me peace of mind that the capacitor can handle electrical surges without failing prematurely. Installation and replacement ease is another key advantage here. The capacitor has three clearly labeled terminals—”Herm” (or “H”) for the compressor motor, “Fan” (or “F”) for the fan motor, and “C” for the common line. This labeling simplifies the wiring process, which is very helpful for someone like me who may be doing a DIY replacement or a quick fix. Since it combines two capacitors into a single unit, it reduces clutter and complexity inside the AC unit, which is a smart design for both efficiency and space-saving. Versatility is also a big plus for this capacitor. It supports 50/60 Hz AC motors commonly found in air conditioners, compressors, refrigerators, storage welding machines, and more. This broad application range means that purchasing this capacitor is a practical investment if I have multiple devices or if I want a capacitor that could work across different equipment types. The ability to replace a wide list of part numbers, including popular models like 97F9834, HC98JA036, and others, means I don’t have to worry about compatibility issues. Lastly, the build quality of the SARABURU CBB65 capacitor stands out. Made from high-quality, durable materials, it’s positioned as an industrial-grade replacement capacitor. This implies better performance and a longer service life, which is crucial because frequent capacitor replacements can be costly and inconvenient. For me, knowing that this capacitor can deliver reliability and durability over time makes it a worthwhile purchase, especially given the critical role capacitors play in starting and running AC motors efficiently. To summarize my thoughts and help you see the key points at a glance, here’s a detailed comparison table of the SARABURU AC CBB65 Capacitor features Feature Details Capacitance 35+5 uF ±5% Voltage Rating 370/440 VAC (450 V max) Type CBB65 Dual Run Circular Start Capacitor Certification UL Certified (E332171) Safety Rating 10,000 AFC Standards Met EIA-456-A, IEC 60252-12001 Terminals Three (Herm/H, Fan/F, Common/C) Applications AC motors in air conditioners, compressors, refrigerators, welding machines, etc. Compatible Part Numbers Includes 97F9834, HC98JA036, P291-3553R, and many others Material Quality High-quality, durable, industrial-grade Overall, after reviewing the SARABURU AC CBB65 capacitor, I feel confident that it’s a reliable and efficient choice for anyone needing a dual run Get It From Amazon Now: Check Price on Amazon & FREE Returns How an AC Unit Capacitor 35/5 Helped Me Improve My Cooling System I recently replaced the capacitor in my air conditioning unit with a 35/5 microfarad model, and it made a noticeable difference. The capacitor is essential because it helps start and run the compressor and fan motor efficiently. Before the replacement, my AC was struggling to cool my home, and I noticed it was taking longer to reach the desired temperature. Once I installed the new capacitor, the unit started up smoothly and ran much quieter. My energy bills also improved after the change. A faulty or weak capacitor can cause the AC to work harder, consuming more electricity. With the 35/5 capacitor, my system operates more efficiently, which means I’m saving money each month. Overall, this simple component upgrade helped me avoid costly repairs and extended the life of my AC unit, making my home more comfortable during hot days. Buying Guide for AC Unit Capacitor 35/5 Understanding What an AC Unit Capacitor 35/5 Is When I first started looking into AC unit capacitors, I learned that the numbers 35/5 refer to the microfarad (µF) ratings of the dual capacitor. This means it has two capacitance values: 35 µF for the compressor and 5 µF for the fan motor. Knowing this helped me ensure I was searching for the correct replacement part for my air conditioning unit. Why I Needed to Replace My Capacitor I noticed my AC unit was struggling to start and making unusual noises. After some troubleshooting, I found that a faulty capacitor was the culprit. Capacitors store and release energy to help start the compressor and fan motor, so a failing capacitor can cause poor performance or prevent the unit from running altogether. Checking Compatibility with My AC Unit Before buying, I made sure the capacitor’s voltage rating and capacitance matched my original part. Most AC capacitors operate at 370V or 440V, and the 35/5 µF rating had to align exactly with what my unit required. I also compared the physical size and terminal configuration to avoid installation issues. Considering the Quality and Durability I looked for capacitors made with durable materials to withstand heat and electrical stress. While I didn’t focus on brand names, I paid attention to the product’s warranty and customer reviews about longevity. A good capacitor can save me money by lasting longer and preventing future breakdowns. Tools and Safety Precautions for Installation Since capacitors store electrical charge, I made sure to discharge the old capacitor safely before handling it. I used insulated tools and turned off power to the AC unit. Knowing how to safely install the capacitor gave me confidence and helped avoid injury or damage to my system. Price vs. Value Considerations I found that prices varied, but I didn’t choose the cheapest option blindly. Instead, I balanced cost with quality and warranty. Investing a bit more in a reliable capacitor gave me peace of mind and reduced the risk of frequent replacements. Final Thoughts on Buying an AC Unit Capacitor 35/5 Understanding the specifications and safety aspects made the buying process straightforward. Taking the time to verify compatibility and quality helped me replace my capacitor effectively and get my AC unit running smoothly again. Author Profile Monalicious Lopez I’m Monalicious Lopez. Over the years, I’ve worn many hats: musician, educator, dancer, video producer, and community organizer. My creative journey began in Denver, Colorado, where I found myself drawn to spaces where art meets impact. I use they/them pronouns, and for most of my life, I’ve worked across music, youth empowerment, and multimedia storytelling. But in 2025, I felt something shift. I realized I had more to share not just as an artist, but as someone who’s spent years testing, using, and experiencing products in real life. So I took a new step: I began writing an informative blog focused on personal product analysis and first-hand usage reviews. 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