---
product_id: 27490386
title: "Blue Sea Systems 5257 MIDI FUSE 125A"
brand: "blue sea systems"
price: "$U1150"
currency: UYU
in_stock: true
reviews_count: 13
category: "Blue Sea Systems"
url: https://www.desertcart.uy/products/27490386-blue-sea-systems-5257-midi-fuse-125a
store_origin: UY
region: Uruguay
---

# 125A fast-acting fuse Compact 3x2x1 inch size Tin-plated corrosion-resistant tabs Blue Sea Systems 5257 MIDI FUSE 125A

**Brand:** blue sea systems
**Price:** $U1150
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up with confidence — fuse smarter, not harder!

## Quick Answers

- **What is this?** Blue Sea Systems 5257 MIDI FUSE 125A by blue sea systems
- **How much does it cost?** $U1150 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/27490386-blue-sea-systems-5257-midi-fuse-125a)

## Best For

- blue sea systems enthusiasts

## Why This Product

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

## Key Features

- • **Visible Fuse Status:** Quickly identify blown fuses to minimize downtime and keep your systems running smoothly.
- • **Versatile Mounting Options:** Through-hole mount compatible with DIY aluminum buss bars or factory fuse blocks for ultimate customization.
- • **Compact & Space-Saving Design:** Small footprint fits easily in tight fuse blocks or custom setups.
- • **Reliable High-Current Protection:** 125A rating ensures robust circuit safety for automotive and marine use.
- • **Corrosion-Resistant Tin-Plated Tabs:** Durable connectors maintain low-resistance, secure connections even in harsh environments.

## Overview

The Blue Sea Systems 5257 MIDI FUSE 125A is a compact, fast-acting fuse designed for reliable circuit protection in automotive and marine applications. Featuring corrosion-resistant tin-plated tabs and a visible blown fuse indicator, it offers durable, low-resistance connections that fit seamlessly into both factory and custom fuse blocks. Trusted by professionals for safety and longevity, this US-made fuse is a must-have for anyone serious about electrical reliability.

## Description

Compact fuses for main or branch circuit protection Standard circuit protection device for automobiles and trucks Tin-plated connector blades for corrosion resistance.

Review: Fits 2005 Mercedes S500 - Fit my 2005 S500. My dad connected a jumper back backwards and blew this fuse. It's under the front passenger carpet and fixed my issue perfectly
Review: Well Designed Fuses For a Reasonable Price - I have degrees and certifications in electronics, so I'm a little fussy about electrical safety and functionality, I really like these fuses because of tab connections, and for visible indication of blown fuse. With most of the consumer-grade high-current low-voltage fuses, the weakest part of the system is the fuse holder. Usually they are made of cheap plastic, often times with undersized wire, and often times do not make a reliable low-resistance connection to the fuse. All of these things add up to a risk of over-heating, and plastic melting, or worse. The tabs on these fuses make for reliable connections, which is what you want, especially if there are fathoms of cold water below your boat. I recently rebuilt the DC power distribution system in our older camp trailer that we inherited. The factory installed fuses were a mess. They were hard to access, hard to tell if they were blown, and hard to remove/replace. I took them all out and replaced them all with these Blue Sea fuses. Because the factory fuse blocks for these Blue Sea fuses are kind of expensive and don’t have hold enough fuses for my need, and because I enjoy making my own stuff that is better than stuff made in a Chinese factory, I made my own fuse block, which was fairly easy because the tabs on these fuses allow them to be screwed securely to an aluminum buss-bar. My fuse block is a collection of 1/2" thick aluminum blocks that are drilled and tapped for 10-24 screws for the tabs on these fuses, and for ring terminals on the ends of interconnection wires. The aluminum blocks and the buss bar are mounted on a 3/4 inch thick oak board. I now have rock solid, low-resistance fuse connections that I'm sure will perform well for many years. I'm quite happy with these fuses. They are reasonably priced and of good quality.

## Features

- Package Dimensions: 0.5 H x 2.9 L x 1.4 W (inches)
- Fast-acting type fuses ideal for electronic devices
- Package Weight: 0.05 pounds
- Country of Origin : United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004ZJ0V1U |
| Best Sellers Rank | #33,764 in Automotive ( See Top 100 in Automotive ) #101 in Fuses #113 in Automotive Fuses |
| Brand | Blue Sea Systems |
| Color | Multicolor |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,139) |
| Date First Available | May 6, 2011 |
| Global Trade Identification Number | 00632085052577 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.3 ounces |
| Item dimensions L x W x H | 3 x 2 x 1 inches |
| Item model number | 5257 |
| Manufacturer | Blue Sea Systems |
| Manufacturer Part Number | 5257 |
| Material | Tin plated |
| Model | MIDI FUSE 125A |
| Mounting Type | Through-Hole Mount |
| Product Dimensions | 3 x 2 x 1 inches |
| UPC | 632085052577 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Blue Sea Systems
- **Item dimensions L x W x H:** 3 x 2 x 1 inches
- **Material:** Tin plated
- **Mounting Type:** Through-Hole Mount
- **UPC:** 632085052577

## Images

![Blue Sea Systems 5257 MIDI FUSE 125A - Image 1](https://m.media-amazon.com/images/I/51p5dDFQrsL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits 2005 Mercedes S500
*by M***X on January 6, 2026*

Fit my 2005 S500. My dad connected a jumper back backwards and blew this fuse. It's under the front passenger carpet and fixed my issue perfectly

### ⭐⭐⭐⭐⭐ Well Designed Fuses For a Reasonable Price
*by A***L on October 10, 2016*

I have degrees and certifications in electronics, so I'm a little fussy about electrical safety and functionality, I really like these fuses because of tab connections, and for visible indication of blown fuse. With most of the consumer-grade high-current low-voltage fuses, the weakest part of the system is the fuse holder. Usually they are made of cheap plastic, often times with undersized wire, and often times do not make a reliable low-resistance connection to the fuse. All of these things add up to a risk of over-heating, and plastic melting, or worse. The tabs on these fuses make for reliable connections, which is what you want, especially if there are fathoms of cold water below your boat. I recently rebuilt the DC power distribution system in our older camp trailer that we inherited. The factory installed fuses were a mess. They were hard to access, hard to tell if they were blown, and hard to remove/replace. I took them all out and replaced them all with these Blue Sea fuses. Because the factory fuse blocks for these Blue Sea fuses are kind of expensive and don’t have hold enough fuses for my need, and because I enjoy making my own stuff that is better than stuff made in a Chinese factory, I made my own fuse block, which was fairly easy because the tabs on these fuses allow them to be screwed securely to an aluminum buss-bar. My fuse block is a collection of 1/2" thick aluminum blocks that are drilled and tapped for 10-24 screws for the tabs on these fuses, and for ring terminals on the ends of interconnection wires. The aluminum blocks and the buss bar are mounted on a 3/4 inch thick oak board. I now have rock solid, low-resistance fuse connections that I'm sure will perform well for many years. I'm quite happy with these fuses. They are reasonably priced and of good quality.

### ⭐⭐⭐⭐⭐ Perfect fit
*by A***R on August 14, 2025*

My local parts stores did not know what is was looking for, but found these fast have had it installed for a few months, gone on road trips no issues work great easy to install took like 5 mins to get tools remove and replace, good quality, came with spares shipped out fast

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-22*