---
product_id: 435435094
title: "[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner"
brand: "bluestars"
price: "3976 kr"
currency: ISK
in_stock: true
reviews_count: 8
url: https://www.desertcart.is/products/435435094-2025-updated-bluestars-540-648-uf-mfd-110-125-vac
store_origin: IS
region: Iceland
---

# 540-648 µF capacitance range 110-125 VAC rated voltage -40℃ to 65℃ operating temp [2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner

**Brand:** bluestars
**Price:** 3976 kr
**Availability:** ✅ In Stock

## Summary

> ⚡ Energize your motor’s future with unmatched reliability!

## Quick Answers

- **What is this?** [2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner by bluestars
- **How much does it cost?** 3976 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/435435094-2025-updated-bluestars-540-648-uf-mfd-110-125-vac)

## Best For

- bluestars enthusiasts

## Why This Product

- Trusted bluestars brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety First:** 10,000 AFC anti-explosion pressure switch engineered for peace of mind
- • **Built to Last:** Durable aluminum casing with OEM-grade quality for long-term stability
- • **Lifetime Assurance:** 100% lifetime protection guarantees worry-free, enduring use
- • **Voltage Versatility:** Reliable operation across 110-125 VAC for seamless compatibility
- • **Power-Packed Precision:** Wide 540-648 µF capacitance ensures optimal motor start-up performance

## Overview

This BlueStars 540-648 µF round start capacitor is a premium OEM replacement designed for single-phase motors in air conditioners, heat pumps, pool pumps, and more. Rated for 110-125 VAC and operating from -40℃ to 65℃, it features a durable aluminum build, a 10,000 AFC anti-explosion pressure switch, and comes with lifetime protection for dependable, long-lasting performance.

## Description

[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner

## Features

- WHAT YOU GET - 540-648 uf/MFD 110-125 VAC Run Round Start Capacitor. Replaces 6FLL1 2MDU5 CAP-540-110
- SPECIFICATIONS - Capacitance: 540-648 uf/MFD; Rated voltage: AC 110-125 Volte; Tolerance : 20%; Shape: Round Run; Capacitor dimensions: 46mmX85mm; Operating temperature range: -40℃ to 65℃; No PCBs. Engineered for safety 10000 AFC anti explosion pressure switch
- REPLACEMENT FOR - OEM Single Phase Motor Capacitors Condenser Straight Cool or Heat Pump Air Conditioner; for pool pump capacitor, water pumps, table saws and general electric motors.
- PREMIUM QUALITY - The replacement part is made from durable high-quality aluminum and well-tested by the manufacturer - Meets OEM standards - Ensures long-lasting and effective performance. This capacitor will provide your electric motors with an outstanding electrical characteristic of high capacitance stability over time and temperature, and very low internal power loss
- 100% LIFETIME PROTECTION: Enjoy reliable performance with our lifetime protection, ensuring that your product will always be covered for any defects or issues that may arise.

## Product Details

- **Brand:** BlueStars
- **Material:** 540-648 MFD
- **Shape:** Round
- **Operating Voltage:** 125 Volts
- **Capacitance Tolerance:** 20%

## Images

![[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner - Image 1](https://m.media-amazon.com/images/I/7139T+PYHfL.jpg)
![[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner - Image 2](https://m.media-amazon.com/images/I/71nGN-YDj+L.jpg)
![[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner - Image 3](https://m.media-amazon.com/images/I/71urOqymSVL.jpg)
![[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner - Image 4](https://m.media-amazon.com/images/I/71nLyXUlaIL.jpg)
![[2025 Updated] BlueStars 540-648 uF MFD 110-125 VAC Volt Run Round Start Capacitor ±20% CD60 Replacement Part - Fit OEM Single Phase Motor Capacitors Condenser Straight Cool Heat Pump Air Conditioner - Image 5](https://m.media-amazon.com/images/I/71F5EjHkIuL.jpg)

## Available Options

This product comes in different **Material Type, Style** options.

## Questions & Answers

**Q: What does "540-648 uF" mean?**
A: "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.

**Q: Can I replace a Motor Start Capacitor with a Motor Run Capacitor?**
A: 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.

**Q: I've installed the Capacitor, but my machine is still not functioning properly. What's the issue?**
A: 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.

**Q: Can a motor start capacitor rated 110-125 volts be hooked up to a 220 volt line input? Will it just burn out?**
A: 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.

**Q: Can I repair the faulty Capacitor?**
A: Capacitors are typically not designed for repair and are considered disposable components. We recommend you to replace by a new one.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fit and worked in pool pump motor
*by N***E on April 30, 2025*

Came the next day, easy install on pool pump motor. Was a direct fit replacement, and the motor started just fine after install. Will buy again if necessary.

### ⭐⭐⭐⭐⭐ Good quality and easy to install.
*by T***Y on March 27, 2025*

Good quality and good product.

### ⭐⭐⭐⭐⭐ Great Capacitor, but you might not need it!
*by C***T on December 18, 2024*

Purchased it because my air compressor kept tripping a breaker when it tried to start. Thinking it was the start capacitor, I purchased and installed this one (along with a new run capacitor because I thought they were both old so I might as well replace them both.) I turned on the compressor and...tripped the breaker. I tightened all the wire connections thinking that might be the problem and...tripped the breaker. Out of frustration and the need to have the compressor working, I took it to an electric motor repair shop. They tested the new capacitor (it was perfect) and installed it. Ran perfect. After paying $142 to the shop (grrr) I took it home and plugged it in. Tripped the breaker. Took it to another outlet on a different circuit and plugged it in. It started and ran perfectly. That's when it dawned on me that the problem was likely a faulty breaker. Switched out the breaker and flipped on the compressor. You guessed it, it ran fine. The moral of my $142 story is don't be dumb like me. Test your "bad" capacitor if you have that capability (I didn't). On the bright side, I have new start and run capacitors. :-)

## Frequently Bought Together

- 540-648 uf/MFD 110-125 VAC Volt Run Round Start Capacitor ±20% Replacement Part by BlueStars - Fit for OEM Single Phase Motor Capacitors Condenser Straight Cool or Heat Pump Air Conditioner
- VEXUNGA 25uF 25 MFD 370VAC 440VAC 450VAC 50/60Hz CBB65 C65R Run Start Capacitor for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool
- Premium 20 MFD uf ± 5% MFD 370 V VAC or 440 Volt Multi-Purpose Motor Run Round Capacitor by Blue Stars - Compatible for Air Conditioner or Heat Pump Condenser - Pack of 1

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-27*