Fastronix 300A 1/2" Severe Duty Master Battery Disconnect Switch with Face Plate

$ 49.99

Score By Feature

Based on 210 ratings

Durability

9.58

Easy to install

9.30

Value for money

9.28

Sturdiness

9.13

OveReview Final Score

How Our Score Is Calculated

Product Description

By entering your model number, you can make sure that this fits.

1/2" Copper Main Studs with a continuous current rating of 300 amps at 12 volts and an intermittent current rating of 2000 amps at 12 volts

It's possible to use it as a single pole or a dual pole system.

Protected from Harsh Environments

After installation, use an index pin to keep the piece from rotating.

Smaller Auxiliary Studs rated at 20A@12VDC can be used as an indicator light or a small accessory.

Questions & Answers

Is it possible to simply connect the positive or negative battery cable to each stud and use it as a switch? Will there be unused secondary terminals?

Yes. My tractor's battery circuit is killed by using it as a switch. BTW. It's well-made and durable.

The lugs are 1/2" in diameter, and the largest cables available are 5/16" in diameter. ?

In most cases, the Fastronix 303-A will be used. The 001 Master Disconnect Switch has a continuous current rating of 180 amps and an intermittent current rating of 1000 amps; however, the estimated current load will ultimately determine which disconnect switch you should use.

Is this available in a two-post format rather than a four-post format?

I'm not sure you need to do any more research on it.

On a 2008 Freightliner D604 battery setup, how do you install it?

On a four-battery Peterbilt, I installed these disconnects, and the Freightliner is no exception. I split the batteries and installed two switches, one for each set of two batteries, due to the excessive current flowing during startup. I had to make some custom cables, but everything is in working order.

Selected User Reviews For Fastronix 300A 1/2" Severe Duty Master Battery Disconnect Switch with Face Plate

For the money, this is the best option

5/5

I needed to turn off the power to my flatbed tow truck's batteries, so I used this. This is the most durable and high-quality cutoff switch I've ever encountered, and I'm very pleased with the quality and load capacity of this switch. If you're looking for a cutoff switch, this is the one to go with. AAA+++.

Milan Whitney

| Jun 09, 2021

according to the description It ought to work perfectly! After looking at that very small, over-rated piece of plastic, I ordered another switch

5/5

This one was exactly what I needed and fit perfectly in my truck. It's made of sturdy metal and includes all of the necessary pins for installation and proper placement. I'm hoping for a long life to shut my winch on and off, and they even responded to my email quickly. CUSTOMER SERVICE OF THE HIGHEST QUALITY.

Maximilian Benson

| Sep 08, 2021

It is well-made

5/5

It is well-made. Heavy-duty construction. The on/off switch is in a good place. I put it on a tractor to cut off the battery when it's parked in the barn, and it works great.

Emory Garrison

| Feb 15, 2021

This thing isn't going to mess around

5/5

Holy cow, this is a heavy hitter. I had previously used other switches, and this was supposed to be the replacement. It's very well made, has some weight to it, and I like how the pin keeps it from rotating. Good buy.

Elijah Waller

| Aug 25, 2021

This is a fantastic idea

5/5

great. Because I have an undetermined battery drain, I use it to turn off and on my car's negative battery.

Bowen HARGREAVES

| Mar 30, 2021

Junk from China for sale

3/5

I had to wiggle it in to get it to connect. I started the truck, let it run for a while, then turned it off and disconnected. The next morning, I had to uninstall it at 3 a. m. so I could start the truck.

Sophie Hanna

| Oct 26, 2021

The switch to turn off the lights is very nice

5/5

Very well constructed. High-amperage applications are possible due to the sturdy construction. It has a locator pin that keeps the switch from spinning while in use, which I like. To install, I simply needed to drill a small hole next to the mounting hole. The price is reasonable. When I wasn't using my travel trailer, I used this as a battery shutoff. This was a good buy.

Jeffrey Klein

| Jan 25, 2021

My 1995 F150 was able to use it

5/5

This was purchased as a low-cost solution to my 1995 F-150's battery drain problem. 150 5. I ran jumper cables from my battery to the switch, cutting the ends off (cheaper than raw wire). When I park it now, I simply turn off the power. There will be no more problems- I'm on the hunt!.