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⚙️ Power your motors with precision and confidence — don’t get left behind!
The BOJACK 40+5 µF dual run circular start capacitor is a high-performance, industrial-grade component designed for AC motors in air conditioners, heat pumps, and condensers. Featuring a robust metal shell and metallized polypropylene dielectric, it operates reliably across a wide temperature range (-40℃ to +70℃) and supports both 370V and 440V AC systems. Its compact round design and clearly labeled terminals simplify installation, making it a trusted choice for professionals seeking durable, efficient motor startup and run solutions.
| ASIN | B07SBQNQ6S |
| Best Sellers Rank | #2,297 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Industrial Electrical Capacitors |
| Brand | BOJACK |
| Brand Name | BOJACK |
| Capacitance | 40.5 Microfarad |
| Capacitance Tolerance | 6 |
| Customer Reviews | 4.7 out of 5 stars 2,061 Reviews |
| Item Dimensions W x H | 1.97"W x 4.53"H |
| Item Shape | Round |
| Manufacturer | BOJACK |
| Material | Polypropylene |
| Material Type | Polypropylene |
| Maximum Storage Temperature | 70 Degrees Celsius |
| Maximum Voltage | 440 Volts |
| Model | BJ-CAP4 |
| Mounting Type | Through-Hole Mount |
| Operating Voltage | 440 Volts |
| Part Number | BJ-CAP4 |
| Shape | Round |
| UPC | 768894138567 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 158 Degrees Fahrenheit |
G**.
Works great, easy swap out
Easy to replace these and save. HOWEVER. If you dont know electric and how a capacitors work. STAY AWAY. Leave it to Professional.
M**A
Easy peasy
Perfect product. Easy to install , especially cause I’m just a girl. Fixed my AC issues instantly! Highly recommend 👍🏼
F**O
Great Product & Economical
Solved our issue and at a HUGE price savings from a H/C company. Had a buddy that does mechanical work install it. Took him 10 minutes and paid him $ 25
K**R
Simple install, fixed AC without an expensive service call!
My outside AC unit stopped functioning. What was happening is it would hum but the fan would spin. The fan motor would get very hot and then the unit would just shut off. At one point to diagnose it, when it went to go on and it was humming I took a stick and pushed the fan blades to see if they were stuck. It started spinning fine then. After doing some research it lead to the capacitor being bad. It holds an electrical charge and when the machine is turned on, it gives the motor that boost it needs to start up. Kind of like kickstarting a manual car with a bad starter. Not wanting to spend an fortune on a service call, I opened the side panel up with 3 screws and read the values on the current capacitor. I ordered the same value AC capacitor here for real cheap. So cheap it wouldn’t be a bad idea to get another one as a spare. To install it, I just took a picture of the current one to see which color wires go where. There was also a wiring diagram on the inside panel. The terminals fit perfectly and it’s just a metal strap with a screw to hold the capacitor in place. Once hooked up, in the disconnect box I flipped the jumper and then went back inside and turned back on the circuit breaker to the unit. I called for AC and it started right up! Problem solved. This was in a Goodman 2.5 ton outdoor AC unit that was installed in the fall of 2011. So the original part lasted 11 years.
J**W
2019 Rheem 14 Seer
Replaced on a 2019 Rheem condenser unit. Fixed!!
J**Y
Capacitor
Worked as good as original at a better price than dealers wanted
A**R
Perfect replacement
Shipped fast
T**N
It worked
It worked
C**A
Worthy replacement
Item arrived as expected and was installed without issue. AC is working again! Will update if issues arise.
C**D
Produit qui répond à mes besoins
Très bien, tel quel que mentionné sur amazon. Livraison très rapide et efficace. Fonction bien.
P**N
Lenox xp16
Parfait pour ma thermopompe lenox xp16 ca fonctionne A1
C**S
Great item
Great item for a fraction of the price from a dealer. Great OEM product and easy to install. No issues after a year of use.
H**N
awesome
Had I called in a technician I would have to replace my AC unit at a cost of more than $7000. But this little piece of miracle saved me. very simple to change.
Trustpilot
1 week ago
2 days ago