---
product_id: 105332386
title: "Fastronix 300A 1/2\" Severe Duty Battery Disconnect Switch with Face Plate"
brand: "fastronix solutions"
price: "€ 69.42"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.ie/products/105332386-fastronix-300a-1-2-severe-duty-battery-disconnect-switch-face
store_origin: IE
region: Ireland
---

# 300A Power Rating Dual Pole Config Index Pin Secure Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate

**Brand:** fastronix solutions
**Price:** € 69.42
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Your Setup with Confidence!

## Quick Answers

- **What is this?** Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate by fastronix solutions
- **How much does it cost?** € 69.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/105332386-fastronix-300a-1-2-severe-duty-battery-disconnect-switch-face)

## Best For

- fastronix solutions enthusiasts

## Why This Product

- Trusted fastronix solutions brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Accessory Ready:** Optional auxiliary studs rated for 20A, ideal for indicator lights or small accessories.
- • **Professional Finish:** Pair with Fastronix terminal covers for a sleek, polished installation.
- • **Secure Installation:** Featuring an index pin to prevent rotation, ensuring your connections stay solid.
- • **Versatile Configuration:** Easily switch between single pole and dual pole setups to suit your needs.
- • **Unmatched Power Handling:** Experience a robust 300A continuous rating, perfect for high-demand applications.

## Overview

The Fastronix 300A Severe Duty Battery Disconnect Switch is engineered for high-performance applications, featuring 1/2" copper main studs rated for 300A continuous and 2000A intermittent use. Its versatile design allows for single or dual pole configurations, while the index pin ensures secure installation. Optional auxiliary studs provide additional functionality, making it the perfect choice for both professional and DIY installations.

## Description

Full description not available

## Features

- 1/2" Copper Main Studs Rated to 300A@12VDC Continuous and 2000A Intermittent
- Can be Used in Single Pole or Dual Pole Configuration
- Index Pin to Prevent Rotation after Installation
- Optional Use Smaller Auxiliary Studs Rated to 20A@12VDC for Indicator Light or Small Accessory
- Use with Fastronix 404-116 Terminal Covers for a Professional Installation

## Product Details

- **Operation Mode:** ON-OFF
- **Current Rating:** 300 Amps
- **Operating Voltage:** 12 Volts
- **Contact Type:** Normally Open
- **Connector Type:** Auxiliary
- **Brand:** Fastronix Solutions
- **Switch Type:** Rotary
- **Terminal:** Pin
- **Material:** Copper
- **Item dimensions L x W x H:** 5 x 2.63 x 2.63 inches

## Images

![Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate - Image 1](https://m.media-amazon.com/images/I/81G91zM5KZL.jpg)
![Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate - Image 2](https://m.media-amazon.com/images/I/815mYOy3WOL.jpg)
![Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate - Image 3](https://m.media-amazon.com/images/I/81sOWaD5yuL.jpg)
![Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate - Image 4](https://m.media-amazon.com/images/I/81+xM9u2MtL.jpg)
![Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate - Image 5](https://m.media-amazon.com/images/I/81f+5eFA1cL.jpg)

## Questions & Answers

**Q: Can you just hook the positive or negative battery cable to each stud and use it as a simple switch? Secondary terminals will be left unused**
A: Yes. I use it as a switch to kill the battery circuit on my tractor.  BTW. It's well built and sturdy.

**Q: The lugs are 1/2" the biggest cables avaiable are 5/16" & is this switch overkill for a average car?**
A: The average car will typically use the Fastronix 303-001 Master Disconnect Switch which is rated to 180A continuous and 1000A intermittent, however the estimated current load will ultimately determine which disconnect switch you should use.

**Q: Is this offered in a 2 post insted of 4 post?**
A: Not sure you need to research it more

**Q: How do you install on a 08 frieightliner d60  4 battery setup?**
A: I put these disconnects on a 4 battery setup on a Peterbilt. Freightliner is no different. Because of the excessive current flowing during starting, I split the batteries and put two switches on, one for each set of two batteries. I had to make some special cables, but it all works very well.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent & Heavy Duty
*by P***R on November 26, 2024*

Fantastic. Solidly built, excellent quality. Would definitely recommend.

### ⭐⭐⭐⭐⭐ It has high capacity
*by B***T on June 26, 2024*

Unfortunately I did return it as the lugs were more like 1/2” and I could only go 3/8 on my cables but this switch is very heavy duty…I really wanted to use it but there was no way to fit itIf you need a solid powerhouse, this is it

### ⭐⭐⭐⭐⭐ Super heavy duty
*by G***H on September 29, 2024*

Installed as a battery cutoff for a rear mounted winch, and the switch is solid. No issues with using very inflexible 3/0 wire. 1/2” lugs fit perfectly.

## Frequently Bought Together

- Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with Face Plate
- 10pcs 4 Awg - 3/8 (M10) Sanuke Wire Lugs 4 Gauge Ring Terminal Connectors Ends, UL Listed Heavy Duty for Battery Cable Lug Wire Electrical Eyelets with 3:1 Dual Wall Adhesive Heat Shrink
- Fastronix 3/8" 2 Post (SPST) 180/1000 Amp High Current Battery Disconnect Switch

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-29*