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Description
5 uF MFD ±5% 370/440 VAC Oval Run Start Capacitor - Fits AC Motor Run, Fan Start, Heat Pump - Replaces 97F57055uF MFD 5% 370 440VAC Oval Run Start Capacitor Key Features Capacitance: 5 MFD uF Tolerance: 5% Voltage Rating: 370V 440V AC Frequency: 50 60 Hz Shape: Oval Construction: Metal case, oil filled for heat dissipation Terminals: 1 4 inch male quick connect Safety Standard: UL recognized Operating Temperature: 40C to +70C Replaces Cross Reference Part Numbers Replaces any oval shaped 5 MFD capacitor with either a 370VAC or 440VAC rating. Compatible
5uF MFD ±5% 370-440VAC Oval Run Start Capacitor
Key Features
- Capacitance: 5 MFD / uF
- Tolerance: ±5%
- Voltage Rating: 370V / 440V AC
- Frequency: 50 / 60 Hz
- Shape: Oval
- Construction: Metal case, oil-filled for heat dissipation
- Terminals: 1/4 inch male quick-connect
- Safety Standard: UL recognized
- Operating Temperature: -40°C to +70°C
Replaces / Cross-Reference Part Numbers
- Replaces any oval-shaped 5 MFD capacitor with either a 370VAC or 440VAC rating.
- Compatible replacement for CBB65 type capacitors with matching specifications.
- Interchangeable with capacitors from brands such as Aerovox, TEMCo, ClimaTek, and others meeting the same MFD and voltage ratings.
Compatibility & Fitment
- Designed for continuous duty in single and three-phase AC motor applications.
- Commonly used in:
- Air conditioner condenser fan motors
- Furnace blower motors
- Heat pumps
- Pool and spa pumps
- Compressors
- Physical Dimensions: 2.0 in Width x 2.5 in Height x 1.25 in Depth (approximate case size).
When to Replace
- Motor produces a humming sound but fails to start.
- The capacitor case is visibly swollen, bulging, or leaking fluid.
- Capacitance measures outside the rated tolerance (below 4.75 uF or above 5.25 uF) when tested with a multimeter.
Installation Tips
- Disconnect all electrical power to the equipment before beginning work.
- Safely discharge the existing capacitor by shorting the terminals with a resistor or an insulated tool.
- Confirm the uF (MFD) rating and voltage of the new capacitor match the component being replaced.
- Note the wiring configuration before disconnecting the old part.
- Ensure all electrical connections are tight and secure after installation.
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
4.6 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
surprised!
I actually didn't realize I had ordered "time released" version. I thought these were just normal melatonin. But now that I've tried these, I love them so much better than the regular version! Helps me sleep better through the night. No taste, love this brand of Source Naturals.
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Reviewed in the United States on October 17, 2025
★★★★★ 5
The only one I'll use!
As the title says, this is the brand to get!! It's fast-acting, doesn't give me weird dreams like some do, and I never wake up feeling groggy.
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Reviewed in the United States on March 13, 2025
★★★★★ 5
Works wonders
I've been buying these for well over a year now as Subscribe and Save. I work 12 hour overnights as a nurse. My sleep schedule normally gets messed up. I would have no problem falling asleep but would wake up only a few hours later which is not good when you have work again that night. We buy these on Amazon due to the great price and the fact that they are extended release which helps keep me asleep longer. When I take 1 or 2 of them, I am able to sleep about 7-8 hours which is great. I take this both when I sleep during the day and sleep during the night. It helps me sleep no matter when and I am able to adjust my sleep schedule often. I have recommended them to many.
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Reviewed in the United States on January 10, 2013
★★★★★ 4
Works quite well, dose still a bit high for me
Used to take the Natrol 5mg slow release, now that I can compare these 2, I love this more. It doesn't make me feel too edgy, it's quite relaxing actually. I still have to halve the dose as the full dose makes me groggy the next day. Where the Natrol gave me very vivid, but not unpleasant dreams, these don't make me dream as vividly. It does take a bit longer to get me to sleep, but once asleep, your asleep. Highly recommend, once I finish this bottle, I'd get the 2mg tr next time, as a lower dose works better for me.
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Reviewed in the United States on July 10, 2014
★★★★★ 5
Excelente Muy Satisfecho
Servicio excepcional, cuidadoso, el producto muy bien empacado. Y el tiempo de entrega fue el acordado. Y del producto ni hablar, excelente.
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Reviewed in the United States on February 3, 2026