HCKS400D050R440Z 40+5 µF/MFD 370/440V AC Round Dual Run Capacitor – Universal HVAC A/C Start Capacitor Replacement for Compressor and Fan
Condition: New
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Availability:
In Stock.
Arrives
Thursday, Oct 29
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At a glance
- Condition
- New
- Size
- 50*125cm 40+5uf
- Model
- HCKS400D050R440Z
- Capacitance
- 40 farad
- Shape
- Round
- Operating Voltage
- 370 volts
- Capacitance Tolerance
- 5%
- In the box
- Capacitor
Features 5
- Clearly Marked Terminals Make Installation Easy And Accurate For Homeowners And Technicians Alike
- Made With Premium Materials To Deliver High Endurance Heat Resistance And Long Lasting Service Life
- WSRXG Dual Run Capacitor Features 40 Plus 5 Microfarad Rating For Use In HVAC Systems Operating At 370 Or 440 Volt AC
- Universal Fit Design Supports Most Major HVAC Brands Providing Smooth Start And Operation For Compressors And Fan Motors
- Compatible With HCKS400D050R440Z Model Offering Reliable Replacement Performance In Air Conditioning And Heat Pump Units
Specs 15
| Capacitance | 40 farad |
|---|---|
| Brand | WSRXG |
| Shape | Round |
| Maximum Storage Temperature | 70 °C |
| Operating Voltage | 370 volts |
| Item Shape | Round |
| Capacitance Tolerance | 5% |
| Mounting Type | Pole Mount |
| Upper Temperature Rating | 70 °C |
| Brand Name | WSRXG |
| Unit Count | 1 Count |
| Manufacturer | WSRXG |
| Number of Items | 1 |
| Model | HCKS400D050R440Z |
| Part Number | HCKS400D050R440Z |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 29
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great Capacitor/Great Product
Size: 50*125cm 40+5uf
Capacitor works great! Item came just as described.
Reviewed in the United States on August 6, 2025 by Patrick
Save your money!
Size: 50*125cm 40+5uf
Cheap price
Reviewed in the United States on May 14, 2025 by James Foster
Tested
Size: 50*125cm 40+5uf
This is a typical 40+5MFD dual capacitor for AC outside unit. The quality seems to be good and it is tested within specification. The AC capacitor is one of the most common summer issue with AC not functioning properly where the homeowners can easily do themselves. The only challenge physically is to take off the cover plate where the device is located at the outside unit. A bad capacitor often bulges but half of them do not have physical signs. A multimeter that can measure capacitance is necessary. This dual capacitor is reasonably priced.
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Reviewed in the United States on April 10, 2026 by GlowingAnt
Simple replacement
Size: 50*125cm 40+5uf
This small device is very important for the operation of your HVAC unit. This is for your compressor and out door fan motor. Without this the unit will not operate properly. This one is for a compressor that requires 40mfd and a fan that requires 5mfd. 440 vac. Operating temperature -40c to 70c . Easy installation, first remove power and open unit to find capacitor. Remove wires and replace wires on new capacitor in the corresponding locations. Close the electrical door and turn power back on. Watch to see how fast it starts up without a lag. It is a great price for comfort. I'm testing it this summer to see how well it holds it's capacitance. Made of a metal metallic outer casing that will prevent it from being punctured or exploding on hot summer days.
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Reviewed in the United States on May 6, 2026 by Kemmie
Well made, and tested within tolerances
Size: 50*125cm 40+5uf
This is a well made AC capacitor. I checked the capacitance using a multi meter, and this capacitor was within the stated tolerances. It represents good value for money.
Reviewed in the United States on March 23, 2026 by Wareco
A Reliable Choice for AC repair
Size: 50*125cm 40+5uf
The HCKS400D050R440Z 40+5 µF 370/440V Dual Run Capacitor is an excellent replacement component for both residential and light commercial air conditioning units. Thanks to its dual voltage rating, it offers the versatility needed to cover a wide range of systems. Installation & Design Replacing the capacitor is straightforward, even for those new to DIY repairs: • Clear Labeling: The terminals feature stamped markings that eliminate guesswork during wiring. • Pro Tip: Always take a reference photo of the original wiring and ensure you discharge the old capacitor safely before removal. • Physical Profile: Note that this model is slightly taller than some OEM versions. You may need to make a minor adjustment to your mounting bracket, but the electrical specifications remain a perfect match. Results Once installed, the capacitor delivers smooth output and steady voltage. In testing, the compressor and fan motor started immediately without hesitation or electrical noise. The Bottom Line If you’re looking for a durable, dependable dual run capacitor that balances high performance with an affordable price point, this is a fantastic fit for your AC maintenance needs.
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Reviewed in the United States on February 9, 2026 by Her & I
Reliable and Robust HVAC Replacement Capacitor
Size: 50*125cm 40+5uf
This dual run capacitor is exactly what you need if you’re repairing or maintaining an HVAC system. The 40 + 5 µF capacity with a 370/440 V AC rating makes it a versatile replacement for both the compressor and fan motors, and it fits well in a wide range of residential and light commercial units. Installation was straightforward, with clear labeling on the terminals that helped avoid any guesswork. The round design is compact and standard, so it fit into the existing mounting bracket without issues. Once installed, the capacitor delivered smooth, steady starts and reliable operation—both the compressor and the fan spun up crisp and without hesitation. Performance-wise, this unit feels solid and well-built. It hasn’t overheated or shown any signs of premature wear even after repeated cycling, and it operates quietly. Whether you’re replacing a faulty OEM capacitor or stocking up on spares, this one checks the boxes for quality and durability. Overall, if you want a dependable dual run capacitor that’s affordable and performs reliably in HVAC applications, this is a strong choice.
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Reviewed in the United States on January 30, 2026 by Samesun
HVAC Dual run Capacitor
Size: 50*125cm 40+5uf
This is a combo run capacitor which connects to both the fan motor and compressor in the outdoor HVAC unit. It seems to be well constructed and the capacitance ratings in microfarads and voltage are clearly marked. It has three terminals on it with multiple connection points on each terminal. Terminals are labeled “C”(common) “Herm”(compressor) and “Fan”(fan motor). A good rule of thumb to remember if you are unable to see the markings is that usually the terminal that has the most connection points will be the “Common”— the terminal with the next most connection points will be the “Herm” and the last terminal with the least connection points will be the “Fan”.
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Reviewed in the United States on February 3, 2026 by Boss Man