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Description
40+5 uF MFD 370/440 VAC Round Dual Run Capacitor Dual Run Circular Start Capacitor - For Air Conditioner, Heat Pump40+5 MFD uF 370 or 440 Volt VAC Round Dual Run Capacitor Key Features Capacitance: 40 + 5 Microfarad (MFD) Voltage Rating: 370V or 440V AC Tolerance: + 5% Frequency: 50 60 Hz Operating Temperature: 40C to +70C ( 40F to +158F) Construction: Round aluminum case Terminals: 3 terminal configuration (C, HERM, FAN) Safety Standard: 10,000 AFC fault current protection Replaces Cross Reference Part Numbers USA2235 TRCFD405 P291 4054RS C3405R C4405R 27L880
40+5 MFD uF 370 or 440 Volt VAC Round Dual Run Capacitor
Key Features
- Capacitance: 40 + 5 Microfarad (MFD)
- Voltage Rating: 370V or 440V AC
- Tolerance: +/- 5%
- Frequency: 50 / 60 Hz
- Operating Temperature: -40°C to +70°C (-40°F to +158°F)
- Construction: Round aluminum case
- Terminals: 3-terminal configuration (C, HERM, FAN)
- Safety Standard: 10,000 AFC fault current protection
Replaces / Cross-Reference Part Numbers
- USA2235
- TRCFD405
- P291-4054RS
- C3405R
- C4405R
- 27L880
- PRCFD405
- HC98JA041
Compatibility & Fitment
- Universal replacement for round dual run capacitors with matching 40/5 MFD capacitance and 370V or 440V ratings.
- A 440V capacitor can replace a 370V capacitor; do not replace a 440V capacitor with a 370V unit.
- Used in air conditioner condensers, heat pumps, and other HVAC systems.
- Physical dimensions are approximately 2.0 - 2.4 inches in diameter and 3.7 - 5.25 inches in height. Verify fitment before purchase.
When to Replace
- Outdoor unit fan does not spin.
- Compressor hums but will not start.
- HVAC system is running but not cooling.
- Visible signs of failure, such as a bulging or leaking capacitor case.
- Capacitance measures outside the specified tolerance when tested with a multimeter.
Installation Tips
- Disconnect all electrical power to the HVAC unit before servicing.
- Discharge the existing capacitor by shorting across the terminals with an insulated-handle screwdriver.
- Photograph or note the wire placement on the C, HERM, and FAN terminals before disconnecting.
- Connect the wires to the corresponding terminals on the new capacitor.
- Secure the new capacitor with the original mounting bracket to prevent vibration.
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
4.3 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 4
⭐️⭐️⭐️⭐️ Adjustable and Better Than Most I’ve Tried
Size: Standard (Pack of 1)
I’m a really tough pillow critic and have a hard time finding one I actually like. With that said, this pillow was better than a lot of others I’ve tried—mainly because you can remove some of the latex shavings to adjust the firmness. I ended up taking out about 20% (do it over a big trash can because the shavings can get messy!).
When it arrived it was too firm for me, which is why I had to take some filling out. Even after adjusting it, it’s still not my absolute favorite pillow, but I do use it every night as a “hug” pillow and it works great for that. I think people who aren’t as picky as I am will probably really enjoy it, especially since you can customize the amount of latex to get it just right.
I’d give it 3.5 stars, but rounded up to 4.
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Reviewed in the United States on November 15, 2025
★★★★★ 5
Good Value Latex Pillow
Size: Standard (Pack of 1)
Most latex are horribly expensive and smell strongly. This pillow good for a side sleeper, little odor, med firm.
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Reviewed in the United States on August 29, 2024
★★★★★ 5
Great size for vintage pillowcases
Size: Standard (Pack of 1)
Gives good support. And very pleased w/ comfort. Slightly larger than old replacement, but not the over-sized "standard" of 25".
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Reviewed in the United States on May 13, 2022
★★★★★ 5
Cool-temperature outer cover
Set name: UltraCool Pillow 2-Pack, King - Soft/Medium, Item length width: 40.0 Inches
The pillows (set of2) are easily fluffed and adjusted to personal desire. The outer cover is cool to the touch. I do not feel "cooler" with the pillow, but it does not get hot like some. I'm a side sleeper and sleep comfortably with the Slumber Cloud. I would buy these again.
Con: pillow cover is slick, so pillow cases slide off.
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Reviewed in the United States on January 10, 2026
★★★★★ 1
not cooling for post menopause
Set name: UltraCool Pillow, Standard - Medium/Firm Firmness, Item length width: 30.0 Inches
As a post menopausal person I did not find this cooling at all. The material is memory foam which holds heat but more importantly my head sinks in so that half of it is always surrounded by the pillow, trapping heat. It IS a supportive, soft and comfy pillow. For cooling though, I found it better to buy a firmer, thinner pillow which keeps my head from sinking into it, allowing heat to dissipate.
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Reviewed in the United States on August 25, 2025