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Description
340-408 uF MFD 110-125 VAC ±20% Round Start Capacitor 50/60 Hz - Fits Single-Phase Motors, Gear Motors340 408 uF MFD 110 125VAC 20% Round Start Capacitor 50 60Hz Key Features Capacitance: 340 408 F (MFD) Rated Voltage: 110 125 VAC Frequency: 50 60 Hz Tolerance: 20% Operating Temperature Range: 40C to +65C ( 40F to +149F) Shape: Round Case Material: Moisture and oil resistant plastic Terminal Type: 1 4 inch male quick connect Replaces Cross Reference Part Numbers Universal replacement for start capacitors with matching specifications. Compatible
340-408 uF MFD 110-125VAC ±20% Round Start Capacitor 50/60Hz
Key Features
- Capacitance: 340-408 µF (MFD)
- Rated Voltage: 110-125 VAC
- Frequency: 50/60 Hz
- Tolerance: ±20%
- Operating Temperature Range: -40°C to +65°C (-40°F to +149°F)
- Shape: Round
- Case Material: Moisture and oil-resistant plastic
- Terminal Type: 1/4 inch male quick-connect
Replaces / Cross-Reference Part Numbers
- Universal replacement for start capacitors with matching specifications.
- Compatible replacement for any brand capacitor rated at 340-408 µF and 110-125 VAC.
- Interchangeable with CD60 type start capacitors.
Compatibility & Fitment
- Designed for the starting circuit of single-phase AC electric motors.
- Commonly used in applications such as:
- Air conditioners
- Air compressors
- Pool and well pumps
- HVAC units
- Other motor-driven equipment
When to Replace
- Motor hums but fails to start or starts slowly.
- Circuit breaker trips upon motor startup.
- Visible signs of damage, such as a bulging case, cracks, or fluid leakage.
- Capacitance measures outside the specified tolerance range when tested with a multimeter.
Installation Tips
- Disconnect all electrical power to the unit before performing installation.
- Safely discharge the existing capacitor by shorting the terminals with a resistor or an insulated tool.
- Verify that the µF (MFD) and VAC ratings of the replacement capacitor match the original part.
- AC start capacitors are non-polarized; wires can be connected to either terminal.
- Ensure all electrical connections are secure.
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
4.2 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Bringing a 1976 MG Midget to the modern world!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
I've been restoring a 1976 MG Midget barn find. I bought some Sinless liner to help make the car rattle less and feel more solid.
This product is easy to cut, easy to install, and extremely sticky. I used it to line the trunk, the interior, and even some under the hood of the old MG. The adhesive stands up to the brutal temperature of the engine bay, and when (by accident) some fuel spilled onto the foam, it didn't fall apart or turn to mush.
Thanks to Siless, the MG now feels like a modern car. The floor pans feel much more solid, the doors make a heftier thud when you close them, and the trunk no longer sounds like a percussion instrument when you touch it.
If you know what you're doing, this product will transform the feel of a car. I found that 36 sq ft was enough for my MG Midget, but for a bigger car I would want more. The pattern on the back helped me to cut perfectly measured squares and rectangles. The foam itself doesn't have a strong odor, it works super well, and has held up to several months of changing temperatures (in the Midwest US.)
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Reviewed in the United States on November 11, 2025
★★★★★ 5
Excellent Car Sound Deadening and Heat Insulation Solution
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
If you're looking for a high-quality car sound deadening and heat insulation material, then the Siless Liner 157 (4 mm) mil 36 sqft is definitely worth considering. This product is designed to offer superior noise reduction and heat insulation for your car, making your driving experience more comfortable and enjoyable.
The closed-cell foam material used in this product is of premium quality, and it effectively blocks out external noise and vibrations. This means you can enjoy a quieter and more peaceful ride, even on noisy roads. In addition, the Siless Liner 157 also provides excellent heat insulation, which can help keep your car cooler in hot weather.
One of the best things about this product is that it's very easy to install. You don't need any special tools or equipment, and the material can be easily cut to fit any shape or size. It's also very lightweight and flexible, which makes it easy to work with.
Overall, the Siless Liner 157 (4 mm) mil 36 sqft Car Sound Deadening Closed Cell Foam & Heat Insulation mat is an excellent choice for anyone looking to improve the comfort and performance of their car. It's a high-quality product that delivers on its promises, and it's definitely worth the investment.
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Reviewed in the United States on March 12, 2023
★★★★★ 4
Heavy-Duty That Works!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
This extreme sound deadening mat performs well for reducing road noise and vibration. It feels dense and adheres securely when properly applied. Once installed, it noticeably improves interior quietness.
Overall, it’s a strong choice for more serious sound insulation projects.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Good product, quite sticky I must say.
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Worked for my van insulation
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Good stuff
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Good stuff, easy to use, self adhesive backing contours around curves easily and works great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
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