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.

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[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

[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

Product ID: 451811584

Details

Brand
BlueStars
Capacitance
40 Microfarad
Material
340-408 MFD
Maximum Storage Temperature
65 Degrees
Shape
Round

⏳30,000 hrs lifetime durability

⚡340-408 µF high capacitance

🔋110-125 VAC operating voltage

5777 som

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Description

⚡ Start Strong, Last Long – Power Your Motors Like a Pro!

BUILT TO LAST - Engineered for up to 30,000 hours of continuous, stable performance under tough conditions.
OEM GRADE QUALITY - Crafted from premium bakelite, meeting strict OEM standards for durability and efficiency.
VOLTAGE VERSATILITY - Operates seamlessly within 110-125 VAC ±20%, perfect for diverse single-phase motors.
PLUG PLAY SIMPLICITY - No rewiring needed—clearly labeled terminals make installation effortless and error-free.
POWER PACKED PRECISION - Delivers a robust 340-408 µF capacitance for reliable motor starts every time.

The 2025 Upgraded BlueStars Round Start Capacitor offers a high capacitance range of 340-408 µF and operates reliably at 110-125 VAC with ±20% tolerance. Designed for single-phase electric and gear motors, it boasts a long lifespan of up to 30,000 hours, premium bakelite construction, and easy installation with labeled terminals. Trusted as a direct replacement for top brands, it ensures stable motor starts and enduring performance, backed by lifetime protection.

Specifications

ASIN	B09TKVD5R4
Best Sellers Rank	#1,383 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Electrical Capacitors
Brand	BlueStars
Brand Name	BlueStars
Capacitance	40 Microfarad
Capacitance Tolerance	20
Customer Reviews	4.4 out of 5 stars 52 Reviews
Included Components	capacitor
Item Dimensions W x H	1.42"W x 3.39"H
Item Shape	Round
Manufacturer	BlueStars
Material	340-408 MFD
Material Type	340-408 MFD
Maximum Storage Temperature	65 Degrees Celsius
Maximum Voltage	125 Volts
Model	340-408 uf/MFD 110-125 VAC
Mounting Type	Snap-In Mount
Operating Voltage	125 Volts
Part Number	340-408 uf/MFD 110-125 VAC
Shape	Round
Unit Count	1.0 Count
Upper Temperature Rating	65 Degrees Celsius

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5777 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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