---
product_id: 65386271
title: "BS9003E Battery Switch Series e on/Off, Unisex-Adult, Multicolor"
brand: "blue sea systems"
price: "₩233440"
currency: KRW
in_stock: true
reviews_count: 2
category: "Blue Sea Systems"
url: https://www.desertcart.kr/products/65386271-bs9003e-battery-switch-series-e-on-off-unisex-adult-multicolor
store_origin: KR
region: South Korea
---

# 350A continuous current AFD models safe switching under load One-piece tinned copper terminals BS9003E Battery Switch Series e on/Off, Unisex-Adult, Multicolor

**Brand:** blue sea systems
**Price:** ₩233440
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your adventures with confidence—switch smart, live fearless!

## Quick Answers

- **What is this?** BS9003E Battery Switch Series e on/Off, Unisex-Adult, Multicolor by blue sea systems
- **How much does it cost?** ₩233440 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/65386271-bs9003e-battery-switch-series-e-on-off-unisex-adult-multicolor)

## 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

- • **Built to Last:** One-piece tinned copper terminals ensure a secure, corrosion-resistant connection that won’t loosen over time.
- • **Switch On the Fly:** AFD models let you toggle power while the engine runs—no alternator damage, no downtime.
- • **Safety First, Always:** IP66-rated protection and ABYC/ISO 8846 compliance mean this switch is engineered for marine and automotive peace of mind.
- • **Power Through Anything:** Handles a robust 350 Amps continuous current for petrol and diesel engines without breaking a sweat.
- • **Effortless Installation & Use:** Flush or surface mount options with a sleek push-button actuator make setup and operation seamless.

## Overview

The Blue Sea Systems BS9003E Battery Switch Series e is a high-performance, marine-grade battery switch designed for professional-grade reliability. Rated for 350 Amps continuous current, it features durable one-piece tinned copper terminals and advanced AFD technology for safe switching under load. With IP66 protection and compliance with key marine safety standards, it’s the trusted choice for demanding petrol and diesel engine applications, ensuring both safety and convenience in one sleek, easy-to-install package.

## Description

Blue Sea Systems BS9003E Battery Switch Series e on/Off, Unisex-Adult, Multicolor : desertcart.co.uk: Business, Industry & Science

Review: Buy this, not the cheap Chinese switches. Safety is worth the price. - Bought this for our self built camper to replace one of the cheap power switches that are all too common on desertcart. The old one was getting extremely hot even though it was operating well below its rates current, hot enough that what alerted us to it was the smell, it had only been installed for a couple of days. You get what you pay for, the quality of this switch is great, handles higher currents than the last one without even getting warm. I'm confident this one is actually rated for the current it states. Easy to install, works great. The old one was dangerous. Don't buy the the cheap Chinese ones, they're dangerous & a false economy. Spend the money, buy one of these. It's not worth the risk of an electrical fire. We've been living in our van full time for a year & a half & we've never had an issue with this switch with it regularly handling 165A when running an air fryer on our 12V leisure battery.
Review: Best battery switch for your boat with big engines - Very well made and easy to fit and sturdy when in place and reassuring to use compared to the usual red key switches normally fitted

## Features

- 350 Amp continuous for petrol and diesel indoor engines
- One-piece tinned copper terminals design that will not disengage over time
- AFD models allow switching while the engine is running without damaging the alternator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000MMC914 |
| Actuator Type | Push Button |
| Best Sellers Rank | 123,744 in Automotive ( See Top 100 in Automotive ) 10 in Boat Battery Switches 356 in Car Battery Switches |
| Brand | Blue Sea Systems |
| Circuit Type | 1-way |
| Colour | Multi-coloured |
| Connectivity Protocol | X-10 |
| Connector Type | IDC |
| Connector type | IDC |
| Contact Material | Metal |
| Contact Type | Normally Open |
| Contact type | Normally Open |
| Control Method | Touch |
| Controller Type | Ring |
| Country Of Origin | USA |
| Current Rating | 350 Amps |
| Current rating | 350 Amps |
| Customer Reviews | 5.0 out of 5 stars 9 Reviews |
| Global Trade Identification Number | 00632085900359 |
| Included Components | Components included in the description |
| International Protection Rating | IP66 |
| Item Dimensions | 7.4 x 16.2 x 21.9 centimetres |
| Item Type Name | Switch battery series e on/off |
| Item Weight | 0.59 Kilograms |
| Manufacturer | Blue Sea Systems |
| Material | Plastic |
| Model Number | 9003e |
| Mounting Type | Flush-mounted or surface mounted |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operating Voltage | 48 Volts |
| Operating voltage | 48 Volts |
| Operation Mode | ON-OFF |
| Operation mode | ON-OFF |
| Specification Met | ABYC, ISO 8846, IP66 |
| Switch Type | Push Button |
| Terminal | Stud |
| UPC | 632085900359 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 1 Degrees Fahrenheit |
| Wattage | 16800 watts |

## Product Details

- **Brand:** Blue Sea
- **Connector type:** IDC
- **Contact type:** Normally Open
- **Current rating:** 350 Amps
- **Item dimensions L x W x H:** 7.4 x 16.2 x 21.9 centimetres
- **Material:** Plastic
- **Operating voltage:** 48 Volts
- **Operation mode:** ON-OFF
- **Switch type:** Push Button
- **Terminal:** Stud

## Images

![BS9003E Battery Switch Series e on/Off, Unisex-Adult, Multicolor - Image 1](https://m.media-amazon.com/images/I/81oD4fs1tCL.jpg)

## Available Options

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

## Questions & Answers

**Q: can the switch work on 52Vdc system**
A: No,  says maximim 48v on the switch.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buy this, not the cheap Chinese switches. Safety is worth the price.
*by O***O on 19 September 2025*

Bought this for our self built camper to replace one of the cheap power switches that are all too common on Amazon. The old one was getting extremely hot even though it was operating well below its rates current, hot enough that what alerted us to it was the smell, it had only been installed for a couple of days. You get what you pay for, the quality of this switch is great, handles higher currents than the last one without even getting warm. I'm confident this one is actually rated for the current it states. Easy to install, works great. The old one was dangerous. Don't buy the the cheap Chinese ones, they're dangerous & a false economy. Spend the money, buy one of these. It's not worth the risk of an electrical fire. We've been living in our van full time for a year & a half & we've never had an issue with this switch with it regularly handling 165A when running an air fryer on our 12V leisure battery.

### ⭐⭐⭐⭐⭐ Best battery switch for your boat with big engines
*by C***Y on 6 August 2013*

Very well made and easy to fit and sturdy when in place and reassuring to use compared to the usual red key switches normally fitted

## Frequently Bought Together

- Blue Sea Systems 9003E e-Series Battery Switch, On/Off, Red
- Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover
- 16 Gauge Marine Wire 16 AWG Marine Grade Wire Include 16AWG 120FT Red & 120FT Black,16 Gauge Tinned Copper Electrical Cable for Boat Automotive Speakers Lighting Solar Outdoor RV Camper Trailer

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**Shop now:** [https://www.desertcart.kr/products/65386271-bs9003e-battery-switch-series-e-on-off-unisex-adult-multicolor](https://www.desertcart.kr/products/65386271-bs9003e-battery-switch-series-e-on-off-unisex-adult-multicolor)

---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-28*