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Description
40 uF MFD 370/440 VAC CBB65A Round Run Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump40 uF MFD 370 440VAC Round Run Start Capacitor Key Features Capacitance: 40 Microfarad (F MFD) Tolerance: 5% to 6% Voltage Rating: Dual 370V 440V AC Frequency: 50 60 Hz Shape: Round Construction: Aluminum case, steel cover Terminals: 1 4 inch male quick connect Operating Temperature: 40 C to 85 C ( 40 F to 185 F) Safety Standard: UL recognized, 10,000 AFC protected Dielectric: Non PCB, metalized polypropylene film Replaces Cross Reference Part Numbers
40 uF/MFD 370-440VAC Round Run Start Capacitor
Key Features
- Capacitance: 40 Microfarad (µF/MFD)
- Tolerance: ±5% to ±6%
- Voltage Rating: Dual 370V / 440V AC
- Frequency: 50/60 Hz
- Shape: Round
- Construction: Aluminum case, steel cover
- Terminals: 1/4 inch male quick-connect
- Operating Temperature: -40° C to 85° C (-40° F to 185° F)
- Safety Standard: UL recognized, 10,000 AFC protected
- Dielectric: Non-PCB, metalized polypropylene film
Replaces / Cross-Reference Part Numbers
- Replaces any round single-value capacitor with a 40 MFD rating and a voltage of 370V or 440V.
- Compatible with industry part numbers including CBB65, 97F series, and others with matching specifications.
- Substitutes for capacitors from multiple brands including Genteq, MARS, Packard, and Aerovox.
Compatibility & Fitment
- Used in single-phase motor applications including HVAC compressors, condenser fan motors, furnace blowers, and heat pumps.
- Physical dimensions are approximately 2.0 inches in diameter and 4.0 inches in height. Verify space in your unit before ordering as dimensions may vary slightly.
- This is a single-value capacitor and is not a direct replacement for dual-run capacitors (e.g., 40/5 MFD) that have three separate terminal posts.
When to Replace
- Motor hums but does not start or has difficulty starting.
- Fan or blower requires a manual push to begin spinning.
- Visible signs of damage on the existing capacitor, such as a swollen or bulging top, or fluid leakage.
- Reduced performance or speed from the motor or compressor.
Installation Tips
- Disconnect all electrical power to the equipment before beginning work.
- Safely discharge the existing capacitor by carefully shorting across the terminals with an insulated screwdriver.
- Note or photograph the wire connections before removing the old capacitor.
- Connect the wires to the new capacitor in the same configuration. Polarity does not apply to AC run capacitors.
- Secure the new capacitor in place using the original mounting bracket or strap.
- Professional installation is recommended for those unfamiliar with electrical component replacement.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 3
Great wrist rest, advertised dimensions slightly inaccurate.
Color: Black Walnut
Perhaps this is nitpicky but I purchased this wrist rest because it was perfectly sized to my keyboard at 29cm wide. It got here, and it's a fine wrist rest in terms of quality, material and feel, but it's not 29cm wide, it's 30.5cm wide. The other dimensions are accurate enough - both only .1mm off, but the mismatched width against my keyboard is enough for me to notice it and obsess over it. If that doesn't bother you, I say go for it. At $15 it's a good deal.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Long lasting
Color: Black Walnut
I’ve had this for two years and it still looks brand new after every day use. Love it.
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Reviewed in the United States on January 21, 2026
★★★★★ 2
Fairly priced but the finish leaves something to be desired
Color: Black Walnut
This wrist rest looks very nice, but I'd give the finish of the wood a C. There are a few rather rough patches, one that feels like it will develop into splinters eventually if it's not refinished. I'm using it for now, but I'm definitely going to refinish it at some point and it's inspired me to make my own wrist rests from scratch out of hardwood. I gave this two stars because it's very pretty and it's fairly comfortable to use. The wood used is pretty expensive, so I'd say that the price of this item is rather fair. I just wish they put a better finish on materials that are so nice.
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Reviewed in the United States on September 15, 2021
★★★★★ 5
Great black leather tray for top of dresser
Color: Black
Excellent item, better than described. Very nice leather inside base. Nice leather trim. Exactly what I was looking for. I give 5 stars 👍
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Reviewed in the United States on January 25, 2026
★★★★★ 5
Built to Last
Color: Black
When purchasing little practical and intentional pieces... it's easy to pick something of lesser value. Looking at all other styles and options, you see buttons and Velcro and magnets and they look enticing. But at the end of the day, you want the satisfaction of knowing you made the right choice. Pay a little extra and get what you want. This little tray will be in your possession for years to come. It's clean and sturdy and classy. Maybe a 2-tone color palette would be a nice option for future builds.
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Reviewed in the United States on February 8, 2026