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โก Power your legacy AC with precision and reliability!
This multi-purpose round capacitor delivers 45+5 ยตF capacitance with ยฑ5% tolerance, supporting both 370V and 440V AC motors. Engineered to operate in extreme temperatures from -40ยฐC to +85ยฐC, itโs built to USA EIA-456-A standards for dependable motor run and fan start applications. Compact and robust, itโs the go-to upgrade for legacy air conditioning and fan motor systems seeking reliable, long-lasting performance.









| ASIN | B0BHVCS31Q |
| Best Sellers Rank | #6,689 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #21 in Industrial Electrical Capacitors |
| Brand | HVAC YELLOW HAT |
| Brand Name | HVAC YELLOW HAT |
| Capacitance | 45 Microfarad |
| Capacitance Tolerance | 5 |
| Customer Reviews | 4.5 out of 5 stars 1,079 Reviews |
| Included Components | / |
| Item Dimensions W x H | 1.97"W x 4.92"H |
| Item Shape | Round |
| Manufacturer | HVAC YELLOW HAT |
| Material | Copper |
| Material Type | Copper |
| Maximum Voltage | 440 Volts |
| Model | 45+5MFD |
| Mounting Type | Wall Mount |
| Operating Voltage | 440 Volts |
| Part Number | 45+5MFD |
| Shape | Round |
| Upper Temperature Rating | 85 Degrees Celsius |
J**.
Reliable Spec PartโReturned After Fan Upgrade, Still Worth Considering for Legacy AC Systems
During a recent AC compressor overhaul, I purchased this 5ยตF capacitor as part of a proactive component refresh. I also installed a **dual-run capacitor** rated for both the compressor and fan circuits, anticipating the need for a separate fan capacitor alongside the new condenser fan motor. The 5ยตF unit arrived quickly, packaged securely with no terminal damage. The aluminum housing was solid, terminals spaced well, and the labeling was clearโideal for quick identification during install prep. However, the fan motor I ended up installing had a **built-in capacitor**, which meant I didnโt need this standalone part. Instead, I wired the motor directly into the dual-run capacitor using the standard C, FAN, and HERM terminal layout. This worked flawlessly and simplified the system wiring. Thatโs the key takeaway for buyers: newer fan motors often include internal capacitors, so before sourcing a separate one, check your motorโs spec label or wiring diagram. If your system uses an older motor, this 5ยตF capacitor appears reliable and well-suited for run/start support. Even though it was returned unused, the build quality and delivery experience made a positive impression. If I were working on a legacy unit againโor troubleshooting a standalone fan circuitโthis would be on my shortlist
D**B
Very good quality product
Very good product, was easy to install and worked perfectly. Installed onto a 5 Ton Rheem unit about 10 yrs old.
A**.
Works Well
Fixed my pool pump not starting issue by replacing the old capacitor with this one
R**Y
Great product
Great product, works as it should great quality, easy to install, definitely recommend.
J**N
Practical option to keep your AC running
Purchased to replace a capacitor for my house AC. These are a low cost option to trouble shoot an AC that's having trouble getting the compressor started. This one worked for my hard start kit. Use caution for DIY repairs. It isn't hard but definitely discuss with a professional or watch videos on YouTube to ensure you know what you are doing - including the need to turn off the power and ground the old capacitor before touching the wires.
J**R
Perfect Fit
Perfect fit for a Century/AO Smith 2 hp pool pump J Frame motor where the capacitor is mounted inside the rear cover.
L**.
Good
Good quality
C**N
Disappointed after waiting days without A/C, shipping issue possibly? Or defective
Eh, I think this had the potential to do the job, however when I waited 2 days without A/C in Florida on 80 degree days, and it didnโt work I was disappointed to say the least. All I can figure is that it got banged up when shipped. I ended up going to an A/C unit store and getting a different one and sure enough, I finally got my A/C back. Amazon, please start putting โFragile, handle with careโ or something. It was easy to install is something good I can say about it though.
S**R
Working Perfectly at the moment! Cheers!
Perfectly working on my Carrier 4-ton Infinity Unit. Installed it yesterday. Hopefully it continues doing the job. Very pleased so far.
S**C
CAPASITOR
Buena calidad tiene aproximadamente 4 meses y a funcionado exelente lo recomiendo al 100%
S**X
Perfect for my portable air conditioner still running !!!
Perfect capacitor for a portable air conditioner save a lot of cash!
D**D
it fixed my problem
so happy this fixed an old ac.
Trustpilot
2 weeks ago
1 week ago