

⚡ Power your HVAC like a pro — reliable, compact, and built to last!
The BOJACK 30+5μF Dual Run Circular Start Capacitor is a high-performance, industrial-grade capacitor designed for AC motors in HVAC systems. Featuring a durable metal shell and metallized polypropylene dielectric, it supports dual motor operation (compressor and fan) with a compact 1.97-inch diameter and 3.94-inch height. Rated for 370V/440V AC and operating across a wide temperature range (-40℃ to +70℃), it offers ±6% capacitance tolerance and a 10,000 AFC safety rating, making it a reliable, cost-effective replacement for central air conditioners, heat pumps, and condenser fan motors.
| ASIN | B07S8KJCPM |
| Best Sellers Rank | #42,569 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #149 in Industrial Electrical Capacitors |
| Brand Name | BOJACK |
| Capacitance | 35 Microfarad |
| Capacitance Tolerance | 6 |
| Customer Reviews | 4.7 out of 5 stars 942 Reviews |
| Item Dimensions W x H | 1.97"W x 3.94"H |
| Item Height | 11.5 centimeters |
| Item Shape | Round |
| Manufacturer | BOJACK |
| Material Type | Polypropylene |
| Maximum Storage Temperature | 70 Degrees Celsius |
| Maximum Voltage | 440 Volts |
| Mounting Type | Through-Hole Mount |
| Operating Voltage | 440 Volts |
| UPC | 768894138543 |
| Upper Temperature Rating | 70 Degrees Celsius |
H**Y
The BOJACK 40+5 MFD 370/440V AC Dual Run Capacitor is a reliable and cost-effective replacement
**BOJACK 40+5 MFD 370/440V AC Dual Run Capacitor** As someone who occasionally handles home HVAC maintenance, I recently needed to replace a failing capacitor in my air conditioning unit and decided to try the BOJACK 40+5 MFD 370/440V AC Dual Run Capacitor. I was looking for a reliable and cost-effective replacement that would restore my unit to proper working order. **What I Like:** - **Reliable Performance**: The BOJACK capacitor performs exactly as expected. After installing it in my air conditioning unit, the system started up smoothly, and I noticed an immediate improvement in the overall operation. The capacitor has been running reliably since installation, with no signs of any issues. - **Universal Fit**: This capacitor is designed to work with a variety of HVAC systems, and it fit perfectly in my air conditioning unit. The standard size and dual run capability make it a versatile replacement part for both compressors and fan motors. - **Durable Construction**: The capacitor feels solid and well-made. It has a metal casing that appears durable and capable of withstanding the harsh conditions often found in HVAC units. I’m confident it will hold up well over time, even in extreme temperatures. - **Cost-Effective**: Compared to OEM parts, the BOJACK capacitor is significantly more affordable. It offers excellent value for money without sacrificing quality, making it a great choice for anyone looking to save on HVAC repairs. **What I Don’t Like:** - **Lack of Detailed Instructions**: While installation is straightforward for those familiar with HVAC systems, the capacitor doesn’t come with detailed instructions. This could be a drawback for someone who is not as experienced with electrical components. It’s important to know what you’re doing or consult a professional if you’re unsure. - **Packaging**: The packaging was minimal, which wasn’t an issue for me, but the capacitor could benefit from better protection during shipping. Mine arrived in good condition, but the packaging might be insufficient for rough handling during transit. - **No Testing Documentation**: The capacitor didn’t include any certification or testing documentation, which some customers might prefer for added peace of mind. However, this hasn’t impacted the performance in my experience. **Bottom Line:** The BOJACK 40+5 MFD 370/440V AC Dual Run Capacitor is a reliable and cost-effective replacement part for HVAC systems. It delivers solid performance, is easy to install for those with experience, and offers excellent value compared to more expensive OEM parts. While the lack of instructions and minimal packaging might be drawbacks for some, the overall quality and affordability make it a worthwhile purchase for anyone needing to replace a capacitor in their air conditioning unit. If you’re looking for a dependable and budget-friendly solution, the BOJACK capacitor is a great choice.
M**E
Exact replacement - worked perfectly.
Good quality - exact replacement for the current capacitor. Took about 15 minutes to replace and as soon as the AC unit was put back together and power was turned back on the house was cooling once again.
J**E
Replacement for B94578700 and works great!
Reaplaced my old Goodman B94578700 with this capacitor and it works perfectly! Great price and is even able to handle a little bit higher loads while still maintaining its 370vac. All in all a win! Easy to diagnose and replace. I'm no hvac tech by any means but this was pretty easy to diagnose and repair! Works great!
N**O
Fits most ac units but may need to be rewired
Works great but I still had to call an ac repair guy to rewire the unit for it to work properly.
P**H
Perfect fit. Worth the $15 to save hundreds or thousands of $.
Perfect fit to replace the capacitor in my 25+ years AC outdoor unit. Saved $$$$$ checking the capacitor and replacing it before calling service tech or replacing entire system. 10 minute repair job and fan and compressor are up and running.
C**N
BOJACK IS THE MOJACK
I’m kicking myself a bit for not having a spare capacitor on hand for what happened to us over the weekend. We were celebrating our grandson’s first birthday and had a crowd in the house on one of the hottest days yet this year. Right about the time my Wife got into an argument with my Mom (can’t have a party without some family drama) I noticed that the A/C wasn’t working. So I did what anyone would do and called my HVAC contractor who I have a service agreement with. Since it was Saturday I got an answering service, after waiting for an hour for a call back I called them back only to find out that the earliest they could come out was Tuesday, three days later. That obviously wasn’t going to work as the temperature was just going to get hotter. These capacitors last anywhere from 5-7 years (according to my research after the fact) and mine was 8 years old. After spending an hour troubleshooting my A/C I noticed that the compressor would try to come on with a fairly loud hum and then quit. I recalled that I had a similar problem with my older A/C after paying for an HVAC contractor to come and change the 14 dollar part for a $200 service call (price from about 10 years ago). I killed the power, opened the service panel and found the old capacitor (shown in the pictures). After a fruitless search for something I could go pick up locally I found this jewel on Amazon with a 1 day delivery. With a houseful spending the night I went ahead and ordered it based on the technical specs you will find on your old capacitor (mine was a 30/5 micro farad capacitor and the BOJACK unit matched my old one exactly). I took some pictures of the connections and removed the old one. I have a multimeter that measures capacitance and after watching a video found online determined that my old one was toast. I received the BOJACK unit about 24 hours later (interior house temperature of 87 degrees!) and quickly installed it. Keeping my fingers crossed I turned on the power and waited for the compressor to kick on, and it did. Saved myself a bunch of money! So if your A/C unit is running (fan blowing) but it is not cooling, shut the breaker, wait 5 minutes and re-energize the power to the unit. Standing next to your compressor wait 5 minutes and listen for a loud hum but not the typical tinny sound of a compressor running. This is a dead give away that your capacitor is done. I went ahead and ordered a second capacitor so that I have a spare one the next time this happens. If I had done that to begin with I would have had it fixed in fifteen minutes, it’s that easy to replace folks. Pleased with this purchase and would recommend.
E**Y
well made
works well
T**R
Air conditioning capacitor!
If you call someone to fix your air conditioning you will learn what the word scammer means. First they will tell you your system is too old and must be replaced.. This is a lie. Most units were built with a fifty year life expectancy. Call them out on it! They may say your system needs a recharge. This is also a lie and your air conditioning will fail again soon afterwards because they do this recharge badly, on purpose, by over pressuring it and pumping air into the system so it will fail. Call them out on it! The starting capacitors do fail sometimes, and they may actually find that problem and replace it. For about $200, and they will use a substandard or underrated capacitor that will fail within the next year. No warranties. Ha ha ha! Please pay again for us to temporarily fix it or buy one of our new $8000 system for “peace of mind”. Call them out on it! This is a bojack… who cares about the name… capacitor rated perfectly for my, and many other ac units. Before this, I had the original eight year old capacitor replaced by an underrated cheapo $15 capacitor (I looked it up). This was supplied and installed for $200 by a local company called Hurlburt. A company with huge billboards all over town. Those signs must have cost a lot, imagine if they spent more money on quality and less on shouting down the competition with billboards? Ha! That’s a fantasy. They’re scammers, so quality is only a catch phrase for luring in people to scam them. Anyway, after telling me that my eight year old air conditioning is way too old and needs replacing, and me not falling for it, he replaced the capacitor with one that failed after three months of use. After reading up on the subject and learning a lot about HVAC, most of which I didn’t know or need to know, this time I did the work myself. It’s super easy barely an inconvenience. It’s like replacing a coil on a car or a big capacitor in a pinball machine. Disconnect. Reconnect. You need a screwdriver and maybe a pliers and a crescent wrench. I laugh at myself now for being scared of it! This allegedly outdated and expired nine year old ac unit has been going regularly and working perfectly now for some time, I check the cap often and it reads well within spec and hasn’t bulged or leaked like the one supplied by the “professional” service. Go figure! Do it yourself and save some money. If it blows, you can buy six replacements for the cost of one “professional” service call. Or let the scammers take you for a ride. Your choice.
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