---
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: "€ 28.08"
currency: EUR
in_stock: true
reviews_count: 13
category: "Blue Stars"
url: https://www.desertcart.hr/products/451811584-2025-upgraded-bluestars-340-408-uf-mfd-110-125vac-20
store_origin: HR
region: Croatia
---

# 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:** € 28.08
**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?** € 28.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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

Product description Perfect fit 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. 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. 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. 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? 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. 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

Review: Excellent value - This is exact replacement as far as physical dimensions for the starting capacitor for a Beverage-Air CDR4-1 circa 2005 refrigerated deli case, so it fits perfectly in the original bracket. The actual capacitance I measured with a Fluke meter is 183.8 microfarads, so it is a little out of spec from that listed, but that is OK for a starting capacitor. This functions properly; after replacing the capacitor, the compressor started right up and the unit is now back to refrigerating properly. It's a great value, especially compared to the cost of having a repairman change it. If you aren't afraid of a little bit of minor work, I highly recommend doing this replacement yourself.
Review: Great fix for two motors - I had a motor that wouldn't start. This was a great fix. Started right up and runs great. So took a chance on a second motor that had been setting a long time. Wow fixed it too.

## 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 | #1,333 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Industrial Electrical Capacitors |
| Brand | BlueStars |
| Brand Name | BlueStars |
| Capacitance | 40 Microfarad |
| Capacitance Tolerance | 20 |
| Customer Reviews | 4.6 out of 5 stars 1,179 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 |

## 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/71atq5Cop0L.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/71UHRPWd7PL.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/71dSchhfvVL.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/71LDa4dZNlL.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/8137nPlqXqL.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

### ⭐⭐⭐⭐⭐ Excellent value
*by M***S on February 27, 2026*

This is exact replacement as far as physical dimensions for the starting capacitor for a Beverage-Air CDR4-1 circa 2005 refrigerated deli case, so it fits perfectly in the original bracket. The actual capacitance I measured with a Fluke meter is 183.8 microfarads, so it is a little out of spec from that listed, but that is OK for a starting capacitor. This functions properly; after replacing the capacitor, the compressor started right up and the unit is now back to refrigerating properly. It's a great value, especially compared to the cost of having a repairman change it. If you aren't afraid of a little bit of minor work, I highly recommend doing this replacement yourself.

### ⭐⭐⭐⭐⭐ Great fix for two motors
*by D***L on May 14, 2026*

I had a motor that wouldn't start. This was a great fix. Started right up and runs great. So took a chance on a second motor that had been setting a long time. Wow fixed it too.

### ⭐⭐⭐⭐⭐ 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!!

## 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
- VEXUNGA 7.5uF 370/440VAC 50/60Hz CBB65 CBB65A Oval Run Start Capacitor 7.5 MFD 370V/440V Air Conditioner Capacitors for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool
- 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 Croatia*
*Store origin: HR*
*Last updated: 2026-06-09*