---
product_id: 20381220
title: "Blue Sea Systems 7139 187-Series Circuit Breaker, Surface Mount, 50A"
brand: "blue sea systems"
price: "KD 37.22"
currency: KWD
in_stock: true
reviews_count: 13
url: https://www.desertcart.com.kw/products/20381220-blue-sea-systems-7139-187-series-circuit-breaker-surface-mount
store_origin: KW
region: Kuwait
---

# 50A Power IP66 Waterproof Max 48V DC Blue Sea Systems 7139 187-Series Circuit Breaker, Surface Mount, 50A

**Brand:** blue sea systems
**Price:** KD 37.22
**Availability:** ✅ In Stock

## Summary

> 🔒 Protect Your Power with Style!

## Quick Answers

- **What is this?** Blue Sea Systems 7139 187-Series Circuit Breaker, Surface Mount, 50A by blue sea systems
- **How much does it cost?** KD 37.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/20381220-blue-sea-systems-7139-187-series-circuit-breaker-surface-mount)

## 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

- • **Waterproof Wonder:** IP66 rated, this circuit breaker thrives in the toughest environments, keeping your systems safe and sound.
- • **Sleek Surface Mount:** Effortlessly integrates into your setup, combining functionality with a modern aesthetic.
- • **Unmatched Protection:** Experience peace of mind with a 'Trip Free' design that ensures safety during fault conditions.
- • **High Interrupt Capacity:** Handles up to 5000A at 12V, ensuring robust performance under pressure.
- • **Versatile Terminal Size:** Designed with a 5/16"-18 terminal size for easy installation and compatibility.

## Overview

The Blue Sea Systems 7139 187-Series Circuit Breaker is a 50A DC surface mount device that combines switching and circuit protection. With a 'Trip Free' design, it ensures safety during fault conditions, is rated IP66 waterproof, and boasts a high interrupt capacity of 5000A at 12V. Its 5/16"-18 terminal size allows for easy installation, making it a reliable choice for any professional setup.

## Description

Blue Sea Systems 7139 187-Series Circuit Breaker, Surface Mount, 50A

## Features

- 50A DC Surface Mount circuit breaker combines switching and circuit protection into a single device
- "Trip Free" design cannot be held "ON" during fault current condition
- Rated IP66 Waterproof
- Max voltage: 48V DC, Interrupt capacity: 5000A @12V, 3000A @ 24V, 1500A @ 42V
- Terminal Size: 5/16"-18

## Images

![Blue Sea Systems 7139 187-Series Circuit Breaker, Surface Mount, 50A - Image 1](https://m.media-amazon.com/images/I/91OO+6NOCNL.jpg)

## Available Options

This product comes in different **Pattern, Color, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Works as advertised
  

*by M***H on Reviewed in the United States 🇺🇸 on March 27, 2023*

I built myself am extra fused power block for my 2011 Ford Crown Victoria and wired this straight to the fuse block to operate an internal cabin Rove 2 4K dash cam. The on/off switch enables me to turn the camera on when needed and off when not. The voltmeter is a plus as my car has a higher rated alternator (200 amps) than a civilian Crown Victoria (135 amps). It enables me to monitor the volts going through my extra fuseblock and ensures that my system is operating inside nominal parameters (14 amps).

### ⭐⭐⭐ 







  
    Parece se calidad
  
  

*by R***O on Reviewed in the United States 🇺🇸 on May 27, 2023*

Aún no sé cómo resultará,se momento parace que funciona correcto

### ⭐⭐⭐⭐ 







  
  
    Will not Trip
  

*by L***. on Reviewed in the United States 🇺🇸 on September 30, 2021*

First of all I purchased the 187series 200amp version and connected it to the positive terminals on my 200Ah LifePo4 battery. Tested it with a heavy load of 210amps.  It didn't trip or showed any signs of tripping .  At least I can shut down the battery easily.I then decided to spend another $100 on a 150Amp  version. This time I connected it between my 2500watt inverter and the battery - making sure I connected the line to the line and the load to the load.Again tested it by plugging in my1100watt kettle and turning on the microwave at the same time. I wanted to simulate a situation whereby I might  do this accidentally.  I dont want to draw that much power (210amps) from my Battery at the one time.Again the 150amp didn't trip or no sign of it to trip.I had previously increased the cable size on the inverter from 16mm2 (pair) to 35mm2 because the 16mm2 was getting uncomfortably hot..I decided to put the original cables back in again Tested once again with the same load.STILL NO TRIP.  Although the cables were worryingly hot.Now it only serves as an on/off switch.I am no EE. At this stage I reckon the the cabling would be in a sorry state when these Circuit breakers trip.Perhaps I am doing something wrong.The Breakers seem very robust.I tried to do the responsible thing by fitting circuit breakers and good high amperage cable.Now it looks like I will have to go back to a Plain Old blade Fuse.

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**Shop now:** [https://www.desertcart.com.kw/products/20381220-blue-sea-systems-7139-187-series-circuit-breaker-surface-mount](https://www.desertcart.com.kw/products/20381220-blue-sea-systems-7139-187-series-circuit-breaker-surface-mount)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-27*