![Main image of [2025 Upgraded] BlueStars 340-408 uF MFD 110-125VAC ±20% Round Start Capacitor 50/60Hz Replacement - Fit for Single-Phase Electric Motors and Gear Motor Applications - Lifetime Up to 30.000 hrs](https://c1.neweggimages.com/productimage/nb640/C67GD2604200Y7VLZ85.jpg)
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![Alt view image 4 of 7 - [2025 Upgraded] BlueStars 340-408 uF MFD 110-125VAC ±20% Round Start Capacitor 50/60Hz Replacement - Fit for Single-Phase Electric Motors and Gear Motor Applications - Lifetime Up to 30.000 hrs](https://c1.neweggimages.com/productimage/nb640/C67GD2604200Y81YAD2.jpg)
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![Alt view image 7 of 7 - [2025 Upgraded] BlueStars 340-408 uF MFD 110-125VAC ±20% Round Start Capacitor 50/60Hz Replacement - Fit for Single-Phase Electric Motors and Gear Motor Applications - Lifetime Up to 30.000 hrs](https://c1.neweggimages.com/productimage/nb640/C67GD2604200Y82D6C1.jpg)
Perfect fit
Universal fit with any brands with the same ratings
Premium quality
This product adopts a high-quality metalized polypropylene film that provides stable and durable performance
Saving solution
Enjoy the great feeling when your engine is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble
Simple installation
Because the capacitor is a relatively simple part, the installation just takes a few minutes and will save you at least a hundred bucks in labor
Feature
What does "340-408 uF" mean?
"340-408 µF" in a motor run capacitor spec means it has a capacitance range of 340 to 408 microfarads (µF), determining its ability to store electrical energy. This range should match the motor's requirements for optimal operation.
Can I replace a Motor Start Capacitor with a Motor Run Capacitor?
Start capacitors give a large capacitance value necessary for a motor to start for a very short period of time (usually seconds long). A start capacitor can never be used as a run capacitor because it cannot handle current continuously.
I've installed the Capacitor, but my machine is still not functioning properly. What's the issue?
There might be several reasons for this such as: Incorrect installation, faulty motor, capacitor compatibility or other electrical issues. If the issue persists, please don't hesitate to reach out. We're here to help.
Can a motor start capacitor rated 110-125 volts be hooked up to a 220 volt line input? Will it just burn out?
No. The voltage rating of a capacitor indicates the maximum voltage that it can handle safely. If you put a 110-120 capacitor where a 220V is required, it may start the motor a couple of times but will fail very soon.
Can I repair the faulty Capacitor?
Capacitors are typically not designed for repair and are considered disposable components. We recommend you to replace by a new one.
Let's Compare and Choose the best one!
 340-408 uf 110-125 VAC |  189-227 uf 220-250 VAC |  50 uf 370/440 V |  45+5 uf 370/440 VAC |  7.5 uf 370/440 VAC |  120uf 250 Volt | |
|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — |
Price | — | — | — | — | — | — |
µF | 340-408 | 189-227 | 50 | 45+5 | 7.5 | 120 |
Voltage | 110-125 | 220-250 | 370/440 | 370/440 | 370/440 | 250 |
Shell's material | Plastic | Plastic | Metal | Metal | Metal | Plastic |
Type | Motor Start Capacitor | Motor Start Capacitor | Run Start Capacitor | Run Start Capacitor | Run Start Capacitor | Motor Run Capacitor |
Operating Temperature | -40°C to 65°C/-40°F to 149°F | -40°C to 65°C/-40°F to 149°F | -25°C to 70°C/-13°F to 158°F | -25°C to 70°C/-13°F to 158°F | -25°C to 70°C/-13°F to 158°F | -25°C to 70°C/-13°F to 158°F |
Operating Frequency | 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz |
CE & UL Certificate | ? | ? | ? | ? | ? | ? |
An Ideal Place for DIY Repairs
"By doing your own repairs, you can save up to 90% compared to buying new."
"Save your wallet"
Make your life more comfortable and convenient by doing your own repairs with our economical solutions.
"Rest assured"
Reliability is what we aim for. We offer you not only high-quality products but also ensure service quality.
"Your words are heard"
As one of the big brands in this field, we care about the community and your voice. If you have any ideas of how or what we should do to be better, don't hesitate to let us know.
How did we get our start?
Everyone knows how expensive it is to buy a new appliance. That's why we started BlueStars to bring you affordable replacement parts with the best quality.
What makes our products unique?
What makes our products unique is that they always meet your needs. We deeply understand why our products are necessary for you and how they can make your life more comfortable. All are manufactured with OEM standards to ensure your satisfaction.
Why do we love what we do?
Because it brings comfort and happiness to your life.
Perfect fit
Universal fit with any brands with the same ratings
Premium quality
This product adopts a high-quality metalized polypropylene film that provides stable and durable performance
Saving solution
Enjoy the great feeling when your engine is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble
Simple installation
Because the capacitor is a relatively simple part, the installation just takes a few minutes and will save you at least a hundred bucks in labor
What does "340-408 uF" mean?
"340-408 µF" in a motor run capacitor spec means it has a capacitance range of 340 to 408 microfarads (µF), determining its ability to store electrical energy. This range should match the motor's requirements for optimal operation.
Can I replace a Motor Start Capacitor with a Motor Run Capacitor?
Start capacitors give a large capacitance value necessary for a motor to start for a very short period of time (usually seconds long). A start capacitor can never be used as a run capacitor because it cannot handle current continuously.
I've installed the Capacitor, but my machine is still not functioning properly. What's the issue?
There might be several reasons for this such as: Incorrect installation, faulty motor, capacitor compatibility or other electrical issues. If the issue persists, please don't hesitate to reach out. We're here to help.
Can a motor start capacitor rated 110-125 volts be hooked up to a 220 volt line input? Will it just burn out?
No. The voltage rating of a capacitor indicates the maximum voltage that it can handle safely. If you put a 110-120 capacitor where a 220V is required, it may start the motor a couple of times but will fail very soon.
Can I repair the faulty Capacitor?
Capacitors are typically not designed for repair and are considered disposable components. We recommend you to replace by a new one.
Let's Compare and Choose the best one!
340-408 uf 110-125 VAC | 189-227 uf 220-250 VAC | 50 uf 370/440 V | 45+5 uf 370/440 VAC | 7.5 uf 370/440 VAC | 120uf 250 Volt |
|---|---|---|---|---|---|
| Customer Reviews | |||||
| — | — | — | — | — | — |
| Price | |||||
| — | — | — | — | — | — |
| µF | |||||
| 340-408 | 189-227 | 50 | 45+5 | 7.5 | 120 |
| Voltage | |||||
| 110-125 | 220-250 | 370/440 | 370/440 | 370/440 | 250 |
| Shell's material | |||||
| Plastic | Plastic | Metal | Metal | Metal | Plastic |
| Type | |||||
| Motor Start Capacitor | Motor Start Capacitor | Run Start Capacitor | Run Start Capacitor | Run Start Capacitor | Motor Run Capacitor |
| Operating Temperature | |||||
| -40°C to 65°C/-40°F to 149°F | -40°C to 65°C/-40°F to 149°F | -25°C to 70°C/-13°F to 158°F | -25°C to 70°C/-13°F to 158°F | -25°C to 70°C/-13°F to 158°F | -25°C to 70°C/-13°F to 158°F |
| Operating Frequency | |||||
| 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz |
| CE & UL Certificate | |||||
| ? | ? | ? | ? | ? | ? |
An Ideal Place for DIY Repairs
"By doing your own repairs, you can save up to 90% compared to buying new."
"Save your wallet"
Make your life more comfortable and convenient by doing your own repairs with our economical solutions.
"Rest assured"
Reliability is what we aim for. We offer you not only high-quality products but also ensure service quality.
"Your words are heard"
As one of the big brands in this field, we care about the community and your voice. If you have any ideas of how or what we should do to be better, don't hesitate to let us know.
How did we get our start?
Everyone knows how expensive it is to buy a new appliance. That's why we started BlueStars to bring you affordable replacement parts with the best quality.
What makes our products unique?
What makes our products unique is that they always meet your needs. We deeply understand why our products are necessary for you and how they can make your life more comfortable. All are manufactured with OEM standards to ensure your satisfaction.
Why do we love what we do?
Because it brings comfort and happiness to your life.