---
product_id: 57324001
title: "Battery Switch ON/Off AFD"
brand: "blue sea systems"
price: "$150.37"
currency: USD
in_stock: true
reviews_count: 8
category: "Blue Sea Systems"
url: https://www.desertcart.us/products/57324001-battery-switch-on-off-afd
store_origin: US
region: United States of America
---

# Safe switching under load (engine running) 350A continuous current capacity Durable tinned copper terminals Battery Switch ON/Off AFD

**Brand:** blue sea systems
**Price:** $150.37
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay Powered, Stay Ahead – Switch Like a Pro!

## Quick Answers

- **What is this?** Battery Switch ON/Off AFD by blue sea systems
- **How much does it cost?** $150.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/57324001-battery-switch-on-off-afd)

## 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:** Single-piece tinned copper terminals maintain shape and conductivity over time.
- • **Compact & Lightweight:** Sleek 7.4 x 16.2 x 22 cm design weighing just 590g fits seamlessly into your setup.
- • **High-Amperage Handling:** Supports a robust 350A continuous current for demanding petrol and diesel engines.
- • **User-Friendly & Reliable:** Clearly labeled 4-position selector ensures hassle-free, error-proof connections.
- • **Power Through Without Pause:** Switch battery sources on-the-fly without risking alternator damage.

## Overview

The Blue Sea Systems Battery Switch ON/Off AFD is a professional-grade 4-position selector switch designed for seamless battery management in petrol and diesel engines. With a continuous 350A rating and the unique ability to switch while the engine runs without damaging the alternator, it offers unmatched reliability. Its durable tinned copper terminals ensure long-lasting performance, all packed in a compact, lightweight design favored by marine and automotive professionals.

## Description

Blue Sea Systems 4-Position Battery Selector Switch Battery Switch 4 Postion No Lock : desertcart.co.uk: Automotive

Review: Very happy. - Well made and solid. Very happy. Just make sure you connect the right leads to the correct terminals on the back to avoid a fair bit of confused head scratching… It’s obvious and well labeled so just blame user error…
Review: Five Stars - Excellent product

## Features

- 350A continuous internal petrol and diesel engine.
- The AFD models allow you to change while the engine is running without damaging the alternator.
- A single piece of tinned copper terminals that do not lose their shape with the passage of time.
- Item Package Dimension: 10.0 cm L x 16.2 cm W x 22.2 cm H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000K2MCR2 |
| Batteries | 1 Unknown batteries required. |
| Batteries included? | No |
| Best Sellers Rank | 159,148 in Automotive ( See Top 100 in Automotive ) 436 in Car Battery Switches |
| Brand | Blue Sea Systems |
| Color | Black |
| Connector type | Screw |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,483) |
| Date First Available | 1 Oct. 2001 |
| Department | Unisex-Adult |
| Included components | BATTERY SELECTOR 4-WAY |
| Is discontinued by manufacturer | No |
| Item display width | 6 inches |
| Item model number | 9001e |
| Manufacturer | Blue Sea Systems |
| Material type | Plastic |
| Number of items | 1 |
| Number of pieces | 5 |
| Product Dimensions | 7.37 x 16.21 x 21.92 cm; 590 g |
| Size | .14 oz |
| Style | Selector 4 Pos. |
| Usage | personal |
| Wattage | 4200 watts |
| Weight | 0.59 Kilograms |

## Product Details

- **Brand:** Blue Sea Systems
- **Connector type:** Screw
- **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:** 32 Volts
- **Operation mode:** ON-OFF
- **Switch type:** Selector 4 Position
- **Terminal:** Screw

## Images

![Battery Switch ON/Off AFD - Image 1](https://m.media-amazon.com/images/I/81n-ap+0lPL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very happy.
*by A***R on 13 March 2024*

Well made and solid. Very happy. Just make sure you connect the right leads to the correct terminals on the back to avoid a fair bit of confused head scratching… It’s obvious and well labeled so just blame user error…

### ⭐⭐⭐⭐⭐ Five Stars
*by T***S on 23 March 2018*

Excellent product

### ⭐⭐⭐⭐⭐ Great product!
*by J***E on 29 August 2017*

Great, very good. I should have bought two. Fast shipping and the product is satisfactorily functional for it's intended purpose. These are really cool We were very pleased to have them. Seems well built and good quality Just thrilled with this item!!!

## Frequently Bought Together

- Blue Sea Systems 9001E e-Series Battery Switch, Selector 4 Position, Red
- Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover
- 14 Gauge Marine Wire,100ft 14 AWG Duplex Marine Grade Wire Tinned Copper Boat Electrical Cable for Boat/Automotive/RV/Camper/Trailer Outdoor Use

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-17*