What does "540-648 uF" mean?

"540-648 µF" in a motor run capacitor spec means it has a capacitance range of 540 to 648 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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BlueStars 540-648 uF MFD 110-125 VAC Run Motor Start Capacitor

BlueStars 540-648 uF MFD 110-125 VAC Run Motor Start Capacitor

Product ID: 435435094

Details

Brand
BlueStars
Capacitance
540 microfarad
Material
540-648 MFD
Maximum Storage Temperature
70 °C
Shape
Round

⚡540-648 µF capacitance range

🔋110-125 VAC rated voltage

🔥Operating temp -40℉ to +149℉

₨509

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Description

⚡ Power your motor’s comeback story with BlueStars brilliance!

BUILT TO LAST - Premium UL, CUL, CEL & TÜV SÜD certified for unmatched safety and durability.
LIFETIME PEACE OF MIND - Backed by 100% lifetime protection—never worry about defects or failures again.
EFFORTLESS INSTALLATION - Quick 1/4" male terminals with leakage protection resistor—DIY-ready in minutes.
UNIVERSAL COMPATIBILITY - Seamlessly replaces any 540-648 µF, 110-125 VAC motor capacitor for instant upgrade.
EXTREME TEMPERATURE RESILIENCE - Operates flawlessly from -40℉ to +149℉, perfect for any environment.

The BlueStars 540-648 µF Run Motor Start Capacitor is a high-performance, universally compatible replacement capacitor designed for 110-125 VAC single-phase motors. Engineered to meet stringent US and Australian safety standards, it features a robust round design, quick-connect terminals, and operates reliably across extreme temperatures. Ideal for HVAC, pool pumps, and general electric motors, it offers easy installation and lifetime protection, making it the go-to choice for professionals and DIYers aiming to restore motor efficiency and avoid costly repairs.

Specifications

ASIN	B09TKVVDPT
Best Sellers Rank	#2,714 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Industrial Electrical Capacitors
Brand Name	BlueStars
Capacitance	540 microfarad
Capacitance Tolerance	20%
Customer Reviews	4.4 4.4 out of 5 stars (95)
Included Components	1
Item Dimensions W x H	1.81"W x 3.35"H
Item Highlight	Fits OEM Single Phase Motor Capacitors Condenser Heat Pump Air Conditioner
Item Shape	Round
Manufacturer	BlueStars
Material Type	540-648 MFD
Maximum Storage Temperature	70 °C
Maximum Voltage	125 volts
Model	540-648 uf/MFD 110-125 VAC
Mounting Type	Panel Mount
Number of Items	1
Operating Voltage	125 volts
Part Number	540-648 uf/MFD 110-125 VAC
Upper Temperature Rating	65 °C

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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₨509

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered 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 Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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