---
product_id: 3836387
title: "On/Off Battery Isolator Switch With Locking Key, Red, 6006 m‑Series"
brand: "blue sea systems"
price: "€ 54.66"
currency: EUR
in_stock: true
reviews_count: 13
category: "Blue Sea Systems"
url: https://www.desertcart.fi/products/3836387-on-off-battery-isolator-switch-with-locking-key-red-6006
store_origin: FI
region: Finland
---

# 300A heavy-duty current 3 versatile mounting options Ignition protected & waterproof On/Off Battery Isolator Switch With Locking Key, Red, 6006 m‑Series

**Brand:** blue sea systems
**Price:** € 54.66
**Availability:** ✅ In Stock

## Summary

> 🔴 Lock in Safety, Power, and Precision with Blue Sea Systems!

## Quick Answers

- **What is this?** On/Off Battery Isolator Switch With Locking Key, Red, 6006 m‑Series by blue sea systems
- **How much does it cost?** € 54.66 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/3836387-on-off-battery-isolator-switch-with-locking-key-red-6006)

## 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

- • **Safety First, Always:** Removable knob prevents accidental power flow during maintenance—your peace of mind switch.
- • **Copper Core Reliability:** One-piece tin-plated copper studs accept multiple cables for a low-resistance, rock-solid connection.
- • **Power Up with Confidence:** Handles up to 300 amps seamlessly for your high-demand DC systems.
- • **Install Anywhere, Securely:** Compact design with surface, rear, or front panel mounting to fit tight spaces effortlessly.
- • **Built to Brave the Elements:** Ignition protected and waterproof, perfect for marine and rugged environments.

## Overview

The Blue Sea Systems 6006 m-Series ON/OFF Battery Isolator Switch is a compact, high-performance switch designed for demanding DC electrical systems up to 48V and 300A. Featuring a removable safety knob, multiple mounting options, and ignition protection, it ensures secure, reliable power control in marine and rugged environments. Its tin-plated copper studs provide durable, low-resistance connections, making it the trusted choice for professionals who demand safety and efficiency in tight spaces.

## Description

A compact battery switch that offers multiple installation options. Switches a single battery to a single load group. Blue Sea Systems m-Series battery switches are compact and waterproof and can be installed almost anywhere. The small footprint and three mounting options make installation easy. M-Series switches are ignition protected and can be located in the engine rooms of gasoline powered boats. The tactile texture of its face and removable knob makes operation in low light easier. Being removable, the knob adds a level of security and will prevent accidental power flow while servicing the electrical system. One piece tin-plated copper terminal studs are long enough to accept multiple cables and will accept the torque required to create a secure connection that minimizes resistance. For a small versatile battery switch that is easy to install and use, look no further than the m-Series from Blue Sea Systems.

Review: Rock-Solid, High-Quality Battery Switch You Can Trust - The Blue Sea Systems 6006 m-Series ON/OFF Battery Isolator Switch is exactly what you want in a critical electrical component: simple, reliable, and built to last. The build quality is outstanding — solid terminals, smooth but positive switching action, and materials that clearly hold up in a marine environment. Installation is straightforward, and the compact m-Series design makes it easy to fit even in tight battery compartments. What really stands out is the confidence it gives you. When it’s OFF, it’s truly OFF. When it’s ON, you know your system is connected without voltage drop or fuss. It handles high current loads effortlessly and stays cool under use. Typical Blue Sea attention to detail shows through: clear labeling, removable knob for safety, and excellent corrosion resistance. This is one of those products you install once and then never think about again — which is exactly what you want for a battery isolator. If you’re upgrading or replacing a battery switch, don’t hesitate. The 6006 is worth every penny and sets the standard for marine electrical hardware. Highly recommende
Review: Works perfectly for my application - This seems to be a high quality switch from a trusted brand. I use it to switch between two house batteries in my VW Westfalia Syncro Camper Van, or to combine both if needed. It also allows me to disconnect both batteries when needed, during wiring or electrical maintenance for example. I will say that it would have been nice to have a set of mounting bolts, however since it can be mounted in various configurations, I can see why they didn't include bolts since they'd have to supply several sets for the various mounting options. I mounted mine to a thin piece of wood in one of my cabinets initially with wood screws, but had to purchase some actual nuts/bolts/washers for a secure fit. Turning the knob to the various positions puts some serious torque on the unit, so a secure mounting job is required and the original wood screws in the pictures didn't last long. If you are mounting to a thicker panel, regular screws might work. Of course, you may want to mount it in one of the different configurations. Wiring is straight forward and I trust this will function for a very long time. Both batteries connect to the switch, which in turn powers a Blue Sea Systems ST Blade ATO/ATC Fuse Block, (https://amzn.to/2ZgpiPw - see picture) which in turn powers all the various and numerous 12v accessories in my van. This makes a great match for safely routing 12V throughout the van using two batteries. I'll update this review should the unit fail or give me problems in the future, but for now, I'm super happy. I could have spent a little less on a lesser known brand of switch, as there are many choices on desertcart, but Blue Sea Systems has a great reputation and I felt like it was worth a few extra bucks. I really don't want to burn down my van due to some cheap electrical switch!

## Features

- Compact design makes installation in tight places easy
- Multiple mounting options; can be installed on the surface, rear, or front of the panel
- Battery On-Off switch with removable knob provides added safety to prevent accidental or unwanted current in the DC system; this is handy during electrical system repairs
- Ignition protected and can be mounted in the engine room of gasoline powered boats
- One piece tin-plated copper studs are 7/8”long and accept multiple cables

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00445KFZ2 |
| Actuator Type | Push Button |
| Batteries | 1 Unknown batteries required. |
| Best Sellers Rank | #2,897 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Boat Battery Switches |
| Brand | Blue Sea Systems |
| Circuit Type | [ASSUMPTION] 2-way |
| Color | Red |
| Compatible Devices | Marine devices, DC-powered devices (up to 48V, 300A), construction equipment, emergency equipment |
| Connectivity Protocol | X-10 |
| Connector Type | Stud |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Control Method | Touch |
| Control Type | ON/OFF |
| Current Rating | 300 Amps |
| Date First Available | December 12, 2001 |
| Department | unisex-adult |
| Global Trade Identification Number | 00632085060060 |
| International Protection Rating | IP66 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.2 ounces |
| Item dimensions L x W x H | 3 x 4 x 6 inches |
| Item model number | 6006 |
| Manufacturer | Blue Sea Systems |
| National Stock Number | 5930-01-561-3673 |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operating Voltage | 48 Volts |
| Operation Mode | manual |
| Product Dimensions | 3 x 4 x 6 inches |
| Specification Met | Iso |
| Terminal | Stud |
| UPC | 632085060060 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Boat |
| Wattage | 14400 watts |

## Product Details

- **Brand:** Blue Sea Systems
- **Circuit Type:** [ASSUMPTION] 2-way
- **Connector Type:** Stud
- **Contact Type:** Normally Open
- **Current Rating:** 300 Amps
- **Item dimensions L x W x H:** 3 x 4 x 6 inches
- **Operating Voltage:** 48 Volts
- **Operation Mode:** manual
- **Switch Type:** Rotary
- **Terminal:** Stud

## Images

![On/Off Battery Isolator Switch With Locking Key, Red, 6006 m‑Series - Image 1](https://m.media-amazon.com/images/I/81Mt5Hrcf3L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Rock-Solid, High-Quality Battery Switch You Can Trust
*by T***G on December 25, 2025*

The Blue Sea Systems 6006 m-Series ON/OFF Battery Isolator Switch is exactly what you want in a critical electrical component: simple, reliable, and built to last. The build quality is outstanding — solid terminals, smooth but positive switching action, and materials that clearly hold up in a marine environment. Installation is straightforward, and the compact m-Series design makes it easy to fit even in tight battery compartments. What really stands out is the confidence it gives you. When it’s OFF, it’s truly OFF. When it’s ON, you know your system is connected without voltage drop or fuss. It handles high current loads effortlessly and stays cool under use. Typical Blue Sea attention to detail shows through: clear labeling, removable knob for safety, and excellent corrosion resistance. This is one of those products you install once and then never think about again — which is exactly what you want for a battery isolator. If you’re upgrading or replacing a battery switch, don’t hesitate. The 6006 is worth every penny and sets the standard for marine electrical hardware. Highly recommende

### ⭐⭐⭐⭐⭐ Works perfectly for my application
*by V***K on February 14, 2021*

This seems to be a high quality switch from a trusted brand. I use it to switch between two house batteries in my VW Westfalia Syncro Camper Van, or to combine both if needed. It also allows me to disconnect both batteries when needed, during wiring or electrical maintenance for example. I will say that it would have been nice to have a set of mounting bolts, however since it can be mounted in various configurations, I can see why they didn't include bolts since they'd have to supply several sets for the various mounting options. I mounted mine to a thin piece of wood in one of my cabinets initially with wood screws, but had to purchase some actual nuts/bolts/washers for a secure fit. Turning the knob to the various positions puts some serious torque on the unit, so a secure mounting job is required and the original wood screws in the pictures didn't last long. If you are mounting to a thicker panel, regular screws might work. Of course, you may want to mount it in one of the different configurations. Wiring is straight forward and I trust this will function for a very long time. Both batteries connect to the switch, which in turn powers a Blue Sea Systems ST Blade ATO/ATC Fuse Block, (https://amzn.to/2ZgpiPw - see picture) which in turn powers all the various and numerous 12v accessories in my van. This makes a great match for safely routing 12V throughout the van using two batteries. I'll update this review should the unit fail or give me problems in the future, but for now, I'm super happy. I could have spent a little less on a lesser known brand of switch, as there are many choices on Amazon, but Blue Sea Systems has a great reputation and I felt like it was worth a few extra bucks. I really don't want to burn down my van due to some cheap electrical switch!

### ⭐⭐⭐⭐⭐ Best quality I have found
*by J***I on September 2, 2025*

Great support and instructions available, built very well and exceeds my expectation of quality. Easy to wire and mount, just wish it came with mounting hardware like screws or nuts and bolts. Best value for my money with such high standards of quality in a switch that is used very frequently. Really makes my battery life last with the ability to use as a disconnect switch.

## Frequently Bought Together

- Blue Sea Systems 6006 m-Series Battery Switch ON/OFF with Knob, Red
- Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover
- Blue Sea Systems 5191 Fuse Block Terminal 30-300 AMP

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fi/products/3836387-on-off-battery-isolator-switch-with-locking-key-red-6006](https://www.desertcart.fi/products/3836387-on-off-battery-isolator-switch-with-locking-key-red-6006)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-24*