---
product_id: 68643563
title: "300 Amp m-Series Battery Switches"
brand: "blue sea systems"
price: "NT$4225"
currency: TWD
in_stock: true
reviews_count: 11
category: "Blue Sea Systems"
url: https://www.desertcart.tw/products/68643563-300-amp-m-series-battery-switches
store_origin: TW
region: Taiwan
---

# 48V max voltage capacity IP66 waterproof protection 300A continuous rating 300 Amp m-Series Battery Switches

**Brand:** blue sea systems
**Price:** NT$4225
**Availability:** ✅ In Stock

## Summary

> 🔌 Power your adventures with confidence—switch smart, stay unstoppable!

## Quick Answers

- **What is this?** 300 Amp m-Series Battery Switches by blue sea systems
- **How much does it cost?** NT$4225 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/68643563-300-amp-m-series-battery-switches)

## 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

- • **Effortless Installation:** User-friendly clamp connectors and clear design make setup easy—even for first-timers.
- • **Marine-Grade Durability:** IP66 waterproof and ignition protected for safe, reliable use on gasoline-powered boats.
- • **Seamless Power Switching:** Make-before-break design ensures zero power interruption when toggling battery banks.
- • **Trusted Quality & Support:** Premium warranty and a 2017 robust redesign back a product that professionals rely on.
- • **Robust High-Capacity Performance:** Handles up to 300 amps continuous at 48 volts DC, perfect for demanding electrical systems.

## Overview

The Blue Sea Systems 300 Amp m-Series Battery Switch is a high-performance, marine-grade ON/OFF switch designed for single or dual battery bank management. Featuring a make-before-break contact design, IP66 waterproof rating, and ignition protection, it ensures seamless, safe power switching up to 300 amps at 48 volts DC. Trusted by professionals and backed by premium warranty support, this switch combines durability, reliability, and ease of installation for demanding automotive and marine electrical systems.

## Description

Dual Circuit. Simultaneously switches two isolated battery banks

Review: After a lot of research these were determined to be the best for the job - We needed isolation switches for our campervan electrics and after a lot of research we found that these were the most highly regarded. They do cost a little more than the cheap replicas but are of much better quality and there is a reason that replicas are created of these in particular. Easy to install considering we are noobs but that is thanks to YouTube.
Review: Good quality - Great quality, does the job!

## Features

- Blue Sea Systems Battery Switch m-Series ON/OFF with Knob, part number 6006, is a Single Circuit ON-OFF switch. Switches a single battery to a single load group
- IP66 waterproof, ISO 8846 and meets ABYC requirements. Ignition protected—safe for installation aboard gasoline powered boats
- Make before break contact design allows switching between battery banks without power interruption
- Continuous Rating: 300A, Maximum Voltage: 48V DC
- Robust redesign done in July 2017. Premium warranty & support

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00445KFZ2 |
| Batteries | 1 Unknown batteries required. |
| Batteries included? | No |
| Best Sellers Rank | 29,533 in Automotive ( See Top 100 in Automotive ) 106 in Car Battery Switches |
| Brand | Blue Sea Systems |
| Color | Red |
| Compatible with | Marine batteries and loads with 300A, 48V DC capacity |
| Connector type | Clamp |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,917) |
| Date First Available | 6 Aug. 2012 |
| Department | unisex-adult |
| Height | 3 inches |
| Included components | BATTERY SWITCH MINI SINGLE CRCT |
| Is discontinued by manufacturer | No |
| Item display length | 7 inches |
| Item display width | 4 inches |
| Item model number | 6006 |
| Manufacturer | Blue Sea Systems |
| Material type | Other |
| Number of items | 1 |
| Product Dimensions | 7.62 x 10.16 x 15.24 cm; 90.72 g |
| Size | One Size |
| Sport | Boating |
| Style | On-off W/Knob |
| Usage | personal |
| Wattage | 14400 watts |
| Weight | 1.5 kg |

## Product Details

- **Brand:** Blue Sea Systems
- **Connector type:** Clamp
- **Contact type:** Make-and-break
- **Current rating:** 300 Amps
- **Item dimensions L x W x H:** 7.6 x 10.2 x 15.2 centimetres
- **Material:** Other
- **Operating voltage:** 48 Volts (DC)
- **Operation mode:** ON-OFF
- **Switch type:** Battery Switch
- **Terminal:** Clamp

## Images

![300 Amp m-Series Battery Switches - Image 1](https://m.media-amazon.com/images/I/81rCa0M4c6L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ After a lot of research these were determined to be the best for the job
*by A***Y on 16 September 2025*

We needed isolation switches for our campervan electrics and after a lot of research we found that these were the most highly regarded. They do cost a little more than the cheap replicas but are of much better quality and there is a reason that replicas are created of these in particular. Easy to install considering we are noobs but that is thanks to YouTube.

### ⭐⭐⭐⭐⭐ Good quality
*by B***R on 7 January 2020*

Great quality, does the job!

### ⭐⭐⭐⭐⭐ great
*by L***H on 14 September 2015*

Arrived in time , great quality

## 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

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**Shop now:** [https://www.desertcart.tw/products/68643563-300-amp-m-series-battery-switches](https://www.desertcart.tw/products/68643563-300-amp-m-series-battery-switches)

---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-21*