---
product_id: 480433833
title: "Blue Sea Systems 350 Amp E-Series Battery Switches"
brand: "blue sea systems"
price: "31983 kr"
currency: ISK
in_stock: true
reviews_count: 4
category: "Blue Sea Systems"
url: https://www.desertcart.is/products/480433833-blue-sea-systems-350-amp-e-series-battery-switches
store_origin: IS
region: Iceland
---

# 350A continuous rating IP66 waterproof protection 48V DC max voltage Blue Sea Systems 350 Amp E-Series Battery Switches

**Brand:** blue sea systems
**Price:** 31983 kr
**Availability:** ✅ In Stock

## Summary

> 🔴 Master your power with Blue Sea’s ultimate battery switch — rugged, reliable, ready.

## Quick Answers

- **What is this?** Blue Sea Systems 350 Amp E-Series Battery Switches by blue sea systems
- **How much does it cost?** 31983 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/480433833-blue-sea-systems-350-amp-e-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

- • **Compact & Flexible:** Small footprint with versatile surface or panel mounting fits tight spaces effortlessly.
- • **Powerhouse Performance:** Handles a robust 350 amps continuous current for your toughest electrical demands.
- • **Marine-Grade Durability:** IP66 waterproof and ignition protected, perfect for harsh marine and vehicle environments.
- • **Smart Alternator Protection:** Integrated Alternator Field Disconnect reduces risk of alternator damage during operation.
- • **Secure & Reliable Connections:** Tin-plated copper studs ensure low resistance and multiple cable compatibility.

## Overview

The Blue Sea Systems 350 Amp E-Series Battery Switch offers a single-circuit ON-OFF control with integrated alternator field disconnect, designed for marine and vehicle use. Rated for 350 amps continuous at up to 48V DC, it features IP66 waterproofing, ignition protection, and tin-plated copper terminals for secure, low-resistance connections. Its compact design supports flexible mounting options, making it ideal for tight installations while meeting ISO 8846 and ABYC standards.

## Description

The Blue Sea Systems 9004E e-Series battery switch delivers simple on and off control for a single battery circuit with an integrated alternator field disconnect. This feature helps reduce the risk of alternator damage if the switch is operated during engine use. Its compact footprint supports installation in tight areas, and flexible mounting options allow for surface or rear panel placement. The switch is ignition protected for gasoline powered boat engine rooms. Tin plated copper studs accept multiple cables and provide secure, low resistance connections. The textured switch face supports operation in low light conditions.

Review: Nearly perfect. Switch feels solid - Nearly perfect. Switch feels solid, and is perfect for a master disconnect for my Jeep's winch. The winch's electrical ring terminal wasn't quite large enough to fit on this these big lugs, so I had to drill it out slightly. Works great. I do wish it had a detachable cover for the back, to protect from shorting to nearby metal on a vehicle, but if you mount it securely, this is not a big concern.
Review: Not quite... - Too large for the available space. Could easily be much smaller.

## Features

- Single Circuit ON-OFF. Switches a single battery to a single load group. Includes AFD (Alternator Field Disconnect)
- Ignition protected—safe for installation aboard gasoline powered boats
- IP66 waterproof, ISO 8846 and meets ABYC requirements
- Terminal Stud Size: 3/8" - 16
- Continuous rating: 350A, Maximum voltage: 48V DC

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FOW1C6 |
| Actuator Type | Push Button |
| Best Sellers Rank | #127,398 in Sports, Fitness & Outdoors ( See Top 100 in Sports, Fitness & Outdoors ) #100 in Electrical Equipment Battery Switches |
| Brand | Blue Sea Systems |
| Brand Name | Blue Sea Systems |
| Circuit Type | 1-way |
| Colour | Red |
| Compatible Devices | Boats |
| Compatible with Vehicle Type | Boat |
| Connectivity Protocol | Wi-Fi |
| Connector Type | Screw Terminals |
| Control Method | Push Button |
| Control Type | Rotary |
| Controller Type | Rotary |
| Current Rating | 350 Amps |
| Customer Reviews | 4.4 out of 5 stars 24 Reviews |
| Global Trade Identification Number | 00632085900458 |
| Included Components | Battery Switch ON/Off AFD, Red |
| International Protection Rating | IP66 |
| Item Dimensions | 10.2 x 10.2 x 6.4 Centimeters |
| Item Type Name | Blue Sea Systems - 9004e Battery Switch ON/Off AFD, Red |
| Item Weight | 408 g |
| Lower Temperature Rating | 40 Degrees Celsius |
| Manufacturer | Blue Sea Systems |
| Material Type | Plastic |
| Model Number | 9004e |
| Mounting Type | Panel Mount, Surface Mount |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operating Voltage | 48 Volts (DC) |
| Operation Mode | Off,On-off |
| Part Number | 9004e-BSS |
| Specification Met | iso |
| Switch Type | Rotary |
| Terminal | Plug In, Clamp, Crimp |
| UPC | 632085900458 061438745130 902228176232 632085090043 |
| Upper Temperature Rating | 85 Degrees Celsius |
| Wattage | 16800 Watts |

## Product Details

- **Connector Type:** Screw Terminals
- **Contact Type:** Normally Open
- **Current Rating:** 350 Amps
- **Operating Voltage:** 48 Volts (DC)
- **Operation Mode:** Off,On-off

## Images

![Blue Sea Systems 350 Amp E-Series Battery Switches - Image 1](https://m.media-amazon.com/images/I/71agEdFeTrL.jpg)
![Blue Sea Systems 350 Amp E-Series Battery Switches - Image 2](https://m.media-amazon.com/images/I/71dPRjdTm3L.jpg)
![Blue Sea Systems 350 Amp E-Series Battery Switches - Image 3](https://m.media-amazon.com/images/I/71H5OViAhEL.jpg)
![Blue Sea Systems 350 Amp E-Series Battery Switches - Image 4](https://m.media-amazon.com/images/I/71suH1AIyOL.jpg)
![Blue Sea Systems 350 Amp E-Series Battery Switches - Image 5](https://m.media-amazon.com/images/I/71897HAy98L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nearly perfect. Switch feels solid
*by B***S on 25 February 2015*

Nearly perfect. Switch feels solid, and is perfect for a master disconnect for my Jeep's winch. The winch's electrical ring terminal wasn't quite large enough to fit on this these big lugs, so I had to drill it out slightly. Works great. I do wish it had a detachable cover for the back, to protect from shorting to nearby metal on a vehicle, but if you mount it securely, this is not a big concern.

### ⭐⭐ Not quite...
*by D***D on 20 January 2026*

Too large for the available space. Could easily be much smaller.

### ⭐⭐⭐⭐⭐ Good Product
*by A***R on 11 November 2019*

Good Product

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---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-09-02*