---
product_id: 451811584
title: "[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"
brand: "bluestars"
price: "₩42880"
currency: KRW
in_stock: true
reviews_count: 13
category: "Blue Stars"
url: https://www.desertcart.kr/products/451811584-2025-upgraded-bluestars-340-408-uf-mfd-110-125vac-20
store_origin: KR
region: South Korea
---

# 30,000 hrs lifetime durability 340-408 µF high capacitance 110-125 VAC operating voltage [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

**Brand:** bluestars
**Price:** ₩42880
**Availability:** ✅ In Stock

## Summary

> ⚙️ Upgrade your motor’s heartbeat with BlueStars — start smart, run strong!

## Quick Answers

- **What is this?** [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 by bluestars
- **How much does it cost?** ₩42880 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/451811584-2025-upgraded-bluestars-340-408-uf-mfd-110-125vac-20)

## 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

- • **Built to Last:** Engineered for up to 30,000 hours of continuous, stable performance under tough conditions.
- • **Plug & Play Installation:** Snap-in mount with clearly labeled terminals makes replacement a breeze—even for non-experts.
- • **Powerful Precision Start:** Optimized 340-408 µF capacitance ensures your motor kicks off with unmatched reliability.
- • **OEM-Grade Quality Assurance:** Crafted from premium bakelite, meeting strict OEM standards for long-term stability and low power loss.
- • **Universal Voltage Compatibility:** Seamlessly fits 110-125 VAC single-phase motors without any wiring hassle.

## Overview

The [2025 Upgraded] BlueStars Round Start Capacitor delivers a robust 340-408 µF capacitance at 110-125 VAC, designed for single-phase electric and gear motors. With a durable bakelite build and a lifetime of up to 30,000 hours, it guarantees reliable motor starts and long-lasting performance. Its snap-in mount and labeled terminals enable quick, no-fuss installation, making it the go-to replacement for a wide range of OEM capacitors.

## Description

[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: desertcart.com: Industrial & Scientific

Review: Perfect Run Capicator for Pool pump - Worked great on my Super Hayward 1 HP pool pump. The original run capacitor is rated 50-400 uf. I read up a little and understood that original run capicator when burns out, makes a humming sound but impeller freely rotates when manually spun around. It may help others to know that you are good to go up a notch on microfarad but not down. I ordered the Upgraded Version 340-408 uf 110-125VAC BlueStar capicator. It was easy to install (I took one wire off at a time from old capacitor to make sure all three are similarly placed). BlueStar capacitor was perfectly sized. It seemed to have a better physical construct quality than the original. Btw I am not a super handy kind of guy but this was easy. Run capacitor is only two outside screws and one inside screw away on an Hayward super pump 1HP (gold). This cost me a little research and 13 bucks, replacement took me 10 minutes max —- saving me hundreds in service/ replacement costs! Few days in, it is going strong. Easy, fast reliable start. Would definitely recommend!!
Review: Perfect fit and fixed my issue - Fixed the problem on my lift. Just be sure the number on your old one exactly matches the new one. And check measurements. Price was a fraction of the cost anywhere else! Other than that I am very pleased and back to lifting cars on the rack!

## Features

- WHAT YOU GET: 340-408 uf/MFD 110-125 VAC Volts Round Start Capacitor 50/60 Hz AC Electric.
- SPECIFICATIONS - Capacitance: 340-408 uf; Rated voltage: AC 110-125V; Tolerance: +/-20%; Shape: Round Motor Start; Capacitor Dimensions: 1.4184 x 3.3884 inch (36 x 86 mm); Operating temperature range: -40℃ to +65℃/ -40℉ to 149℉; No PCBs; Lifetime: Up to 30.000 hours
- REPLACEMENT FOR - Aerovox, Dayton 4X067, MARS 11022, JARD 11922, Global 1022, 092A340B125AD2A, PMJ340, PMJ340A, Vanguard BC-340, Mallory PSU34015 235-9739-02 NTE Electronics MSC125V340, CS340-408x110 - Supco and other Start Capacitors with this uF/Mfd & VAC Rating
- INSTRUCTIONS: No wiring or adapter changes are required. Three terminals on the top are labeled "Herm"/"H" for the compressor motor, "Fan"/"F" for the fan, and "C" for the common line.
- PREMIUM QUALITY - The replacement part is made from durable high-quality bakelite 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09TKVD5R4 |
| Best Sellers Rank | #2,636 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Industrial Electrical Capacitors |
| Capacitance Tolerance | 20 |
| Date First Available | February 28, 2022 |
| Item Weight | 3.2 ounces |
| Item model number | 340-408 uf/MFD 110-125 VAC |
| Manufacturer | BlueStars |
| Maximum Voltage | 125 Volts |
| Mounting Type | Snap-In Mount |
| Operating Voltage | 125 Volts |
| Product Dimensions | 1.42"W x 3.39"H |
| Upper Temperature Rating | 65 Degrees Celsius |

## Product Details

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

## Images

![[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 - Image 1](https://m.media-amazon.com/images/I/4133yZgwd0L.jpg)
![[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 - Image 2](https://m.media-amazon.com/images/I/41VypAAK0aL.jpg)
![[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 - Image 3](https://m.media-amazon.com/images/I/51639DtS4GL.jpg)
![[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 - Image 4](https://m.media-amazon.com/images/I/51FGwDn9lnL.jpg)
![[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 - Image 5](https://m.media-amazon.com/images/I/51XuxuMxHuL.jpg)

## Available Options

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

## Questions & Answers

**Q: What does "340-408 uF" mean?**
A: "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.

**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

### ⭐⭐⭐⭐⭐ Perfect Run Capicator for Pool pump
*by J***K on August 2, 2025*

Worked great on my Super Hayward 1 HP pool pump. The original run capacitor is rated 50-400 uf. I read up a little and understood that original run capicator when burns out, makes a humming sound but impeller freely rotates when manually spun around. It may help others to know that you are good to go up a notch on microfarad but not down. I ordered the Upgraded Version 340-408 uf 110-125VAC BlueStar capicator. It was easy to install (I took one wire off at a time from old capacitor to make sure all three are similarly placed). BlueStar capacitor was perfectly sized. It seemed to have a better physical construct quality than the original. Btw I am not a super handy kind of guy but this was easy. Run capacitor is only two outside screws and one inside screw away on an Hayward super pump 1HP (gold). This cost me a little research and 13 bucks, replacement took me 10 minutes max —- saving me hundreds in service/ replacement costs! Few days in, it is going strong. Easy, fast reliable start. Would definitely recommend!!

### ⭐⭐⭐⭐⭐ Perfect fit and fixed my issue
*by F***L on January 13, 2026*

Fixed the problem on my lift. Just be sure the number on your old one exactly matches the new one. And check measurements. Price was a fraction of the cost anywhere else! Other than that I am very pleased and back to lifting cars on the rack!

### ⭐⭐⭐⭐⭐ perfect
*by K***E on January 23, 2026*

Worked as expected. My brother said it was very easy to install

## Frequently Bought Together

- Upgraded Version 340-408 uf 110-125VAC ±20% Round Start Capacitor 50/60Hz Replacement Part by Blue Stars - Fit for Single-Phase Electric Motors and Gear Motor Applications - Lifetime Up to 30.000 hrs
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- BlueStars Upgraded Version 10 uF MFD ±5% 370/440V CBB65 Oval Run Start Capacitor Replacement Part - Fit for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditioner - Lifetime Up to 30.000 hrs

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-01*