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Fastronix Solutions High Current Master Battery Disconnect Switch Kit

4.8 4.8 out of 5 stars 1,245 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Battery Switches by Fastronix Solutions

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2-Post Kit

Purchase options and add-ons


About this item

  • Easy to Use Kit for a Professional Installation
  • High Current (180A Continuous/1000A Intermittent) Battery Disconnect Switch with Black On/Off Plate
  • Contains #2 3/8" Copper Lugs, Heavy Duty Heat Shrink, and Rubber Terminal Insulators
  • Works Great As a Power Disconnect for RV's When Not in Use
See more product details

Additional Details

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$39.99
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Sold by Legacy Motorsports and ships from Amazon Fulfillment.
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$10.69 ($1.07/Count)
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Sold by TKDMR Store and ships from Amazon Fulfillment.
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$51.99
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Sold by Legacy Motorsports and ships from Amazon Fulfillment.
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Fastronix Solutions High Current Master Battery Disconnect Switch Kit
Fastronix Solutions High Current Master Battery Disconnect Switch Kit
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Price$39.99$9.99$15.99$6.02-19% $12.14
List:$14.99
$15.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Value for money
4.7
4.3
4.6
3.8
4.6
4.4
Easy to install
4.7
4.5
4.5
3.9
4.6
4.7
Sturdiness
4.8
4.6
4.5
4.3
Easy to use
4.4
4.5
4.2
4.4
Weatherproof
4.1
3.8
4.2
Sold By
Legacy Motorsports
Ampper Direct
Ampper Direct
zhijiangshiquedushangmaoyouxiangongsi
Amazon.com
Bang4buck
material
Copper,Rubber
Acrylonitrile Butadiene Styrene
Brass
Copper, Acrylonitrile Butadiene Styrene, Plastic
Brass
switch type
Kill Switch
Rotary
Rotary
connector type
Screws
Quick Disconnect
Plug In
Crimp
number of positions
2
2
2
2
actuator type
Rotary
Rotary
Rotary
Rotary
terminal type
Screw
Marine
Marine
Spst

From the brand


Product Description

car
quality

Standard Features

Face Plate

Body

Faceplate

Studs

Heavy Duty Metal Handle

  • Includes position indicator on the top of the handle.
  • Handle is spring loaded to the off position to prevent incidentally turning on
  • Solid click when turning the switch to the on position.

Durable Metal Body

  • Heavy duty metal case protects internal components of the switch for use in the harshest conditions.

Clean Looking Face Plate

  • Black face plate with silver outline.
  • Clear on/off switch position indication.

3/8" Diameter Brass Studs

  • Includes brass nut and lock washer.
  • 1" long studs
  • Rated to 180 Amps continuous duty, 1000 Amps intermittent duty.

Technical Specifications

Max Continuous Current @12V 180 Amps
Max Intermittent Current @12V 1000 Amps
Main Stud Diameter 3/8"
Stud Material Brass
Body Material Zinc-Aluminum
Faceplate Diameter 2.5"
2 post 4 post  2 post kit 4 post kit Severe duty
Fastronix 2 Post Master Disconnect Switch Fastronix 2 Post Master Disconnect Switch Kit Fastronix 4 Post Master Disconnect Fastronix 4 Post Master Disconnect Switch Kit Fastronix 2 Post Severe Duty Disconnect Switch
Customer Reviews
4.8 out of 5 stars
1,245
4.8 out of 5 stars
1,245
4.8 out of 5 stars
1,245
4.8 out of 5 stars
1,245
4.8 out of 5 stars
299
300 Amp 1/2" Studs
180 Amp 3/8" Studs
20 Amp #10 Studs
3/8" 2 Gauge Copper Lugs
Heavy Duty Heat Shrink
3/8" Flexible Terminal Covers

Product information

Technical Details

Additional Information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Fastronix Solutions High Current Master Battery Disconnect Switch Kit


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Customer reviews

4.8 out of 5 stars
4.8 out of 5
1,245 global ratings

Customers say

Customers like the quality, ease of installation, value, durability, and fit of the electronic switch. For example, they mention it's made very sturdy, easy to wire up, and well worth the investment. That said, they also like the appearance, battery life, and click.

AI-generated from the text of customer reviews

190 customers mention172 positive18 negative

Customers are satisfied with the quality of the electronic switch. They mention it's sturdy, heavy duty, and well made. The switch is made of metal, making it durable in all weather situations. Customers also say it'll be impressive and has no issues.

"...it on gives confidence it won't accidentally turn off, and it feels very sturdy. Very happy with this purchase...." Read more

"Very heavy duty, much larger than I had expected but great product" Read more

"...No issues at all. I recommend using this on a semi truck." Read more

"It is very solidly built. The weight could be considered a con...." Read more

36 customers mention33 positive3 negative

Customers find the installation of the electronic switch to be easy. They mention that it works great, is easy to wire up, and mount. Customers also appreciate the clear instructions and the simple design. They say the switch is easy for them to know when it's on or off, and that the truck starts as easy as without it.

"...amperage being on a 4 battery Cummins truck but the truck starts as easy as without it. No issues at all. I recommend using this on a semi truck." Read more

"Very easy to install and does what it is supposed to do...." Read more

"...Very easy to know when you are on or you are off, even if the back plate is not perfectly aligned." Read more

"...but not a big deal really..Once the hole is cut,the remainder of the install is a breeze. Installed in my fifth wheel as a battery disconnect...." Read more

28 customers mention28 positive0 negative

Customers are satisfied with the value of the electronic switch. They mention that it is a great buy, works exactly as described, and is well worth the investment.

"...Very well made and (I think) a really good price." Read more

"Good quality switch at a very reasonable price.....will buy these again if we need more. We are using them for a disconnect on our trucks...." Read more

"Good part at a good price." Read more

"Good quality, worth the money." Read more

13 customers mention10 positive3 negative

Customers like the durability of the electronic switch. They mention it's a good heavy duty replacement, bulletproof, and useful for protecting and isolating high AH batteries. Some say that the switch is easy to bend back, but it works as advertised and lasts.

"...post covers if you don't already have them, they are a useful bit of extra protection." Read more

"...Hopefully it will hold up and keep working for a long time...." Read more

"...The faceplate was bent from shipping, it bent flat easy enough. It had enough threads to mount to 1/4” CDX board...." Read more

"...My one complaint is that the face plate was easy to scratch when installing the nut on the front." Read more

13 customers mention10 positive3 negative

Customers like the fit of the electronic switch. For example, they mention it's easy to install, has a good size on the lugs for the wire, and is compact. They also say it doesn't loosen or slip in its mounting hole.

"...It also has not loosened or slipped in it's mounting hole since installation...." Read more

"...It's not loose and flimsy. It claims to be capable of 180 amps continuous current, a higher value than most of the other switches I reviewed...." Read more

"...This switch was a perfect fit replacement. 20 minutes and the new switch was installed and I was running again...." Read more

"...There is play in the mounting and the bolt is small. Seems it would benefit from being on a splined shaft instead of a wedge design...." Read more

12 customers mention12 positive0 negative

Customers are satisfied with the appearance of the electronic switch. They mention that it looks good, has a retro appearance, and is designed and built right. Some say that it's a nice HD switch with a good finish.

"...The weight could be considered a con. But the retro appearance and amp capacity made it the best choice for my application...." Read more

"...The switch works perfectly and looks great! I couldn't be happier with it or the seller. Really great experience!" Read more

"...Installation was a breeze, It looks good and is super durable. I highly recommend" Read more

"Like all the Fastronix parts I have ever bought, this switch is designed right and built right. A+" Read more

11 customers mention11 positive0 negative

Customers like the battery life of the electronic switch. They mention that it keeps the battery from draining, saves the life of your car battery, and works great to disconnect the battery. Some say that the switch is well built and perfect for a battery disconnection switch for an RV.

"...I tested it with my multimeter before installing and the disconnect works perfectly- not sure what the other reviewer was referring to...." Read more

"...every time I bring it home from a show and will keep the battery from draining between drives." Read more

"...No more overnight battery drain with this switch." Read more

"...this on my hotrod that sits for long periods of time and saves the battery from draining, it's also a security guard if put in a secure spot." Read more

11 customers mention11 positive0 negative

Customers like the click of the electronic switch. They say it's solid, has a positive click when used, and has definite clicks on and off. The switch feels like good contact is being made and has good sharp feeling. Customers also mention that the indent at close position is very firm.

"...The solid click when I turn it on gives confidence it won't accidentally turn off, and it feels very sturdy. Very happy with this purchase...." Read more

"...There is a definitive "click" when you switch it on...." Read more

"...Metal- not plastic, and a positive click when used. Buy it!" Read more

"...That said, the switch is solid, it's got a nice mechanical click to it, a nice indent for the positioning, it's handy that the faceplate is..." Read more

A solid switch that switches both battery and ignition is hard to find. Exactly what I needed.
5 Stars
A solid switch that switches both battery and ignition is hard to find. Exactly what I needed.
I put this in the seat pedestal of my 2020 Sprinter to serve as a disconnect for the connection between the starter battery and the solar system in the back. By connecting the smaller posts to the ignition wire that has voltage only when the vehicle is running, I was able to send that signal to the back as well, which I use with a relay to switch between a Victron DC-DC charger (which pulls from the engine while running and safely charges the Lithium batteries according to their charge profiles) and a Magnum smart battery combiner (which sends power to from the Solar/Lithium system when the car is not running, calibrated so that it only connects when the Lithiums are nearly full). This setup ensures my electric sliding door no longer drains my starter battery. All this to say, I appreciate having a solid switch like this to completely disconnect the two systems when it's time for maintenance. Unlike most other battery switches I found, being able to recess the bulk of it in the seat pedestal and only expose the relatively low profile switch means it's not a trip hazard. The solid click when I turn it on gives confidence it won't accidentally turn off, and it feels very sturdy. Very happy with this purchase. May as well get the kit with the rubber post covers if you don't already have them, they are a useful bit of extra protection.
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Top reviews from the United States

Reviewed in the United States on March 20, 2024
Size: 2-PostVerified Purchase
Reviewed in the United States on January 14, 2024
Size: 2-PostVerified Purchase
Reviewed in the United States on October 4, 2021
Size: 4-PostVerified Purchase
Customer image
5.0 out of 5 stars A solid switch that switches both battery and ignition is hard to find. Exactly what I needed.
Reviewed in the United States on October 4, 2021
I put this in the seat pedestal of my 2020 Sprinter to serve as a disconnect for the connection between the starter battery and the solar system in the back. By connecting the smaller posts to the ignition wire that has voltage only when the vehicle is running, I was able to send that signal to the back as well, which I use with a relay to switch between a Victron DC-DC charger (which pulls from the engine while running and safely charges the Lithium batteries according to their charge profiles) and a Magnum smart battery combiner (which sends power to from the Solar/Lithium system when the car is not running, calibrated so that it only connects when the Lithiums are nearly full). This setup ensures my electric sliding door no longer drains my starter battery. All this to say, I appreciate having a solid switch like this to completely disconnect the two systems when it's time for maintenance. Unlike most other battery switches I found, being able to recess the bulk of it in the seat pedestal and only expose the relatively low profile switch means it's not a trip hazard. The solid click when I turn it on gives confidence it won't accidentally turn off, and it feels very sturdy. Very happy with this purchase. May as well get the kit with the rubber post covers if you don't already have them, they are a useful bit of extra protection.
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5 people found this helpful
Report
Reviewed in the United States on December 11, 2023
Size: 2-Post KitVerified Purchase
Reviewed in the United States on December 1, 2021
Size: 2-Post KitVerified Purchase
Reviewed in the United States on April 9, 2023
Size: 2-PostVerified Purchase
Reviewed in the United States on February 7, 2017
Size: 2-PostVerified Purchase
Customer image
5.0 out of 5 stars Metal safety current switch
Reviewed in the United States on February 7, 2017
I bought this to compliment a winch and ARB bumper install. I wanted a safety switch that would isolate the winches power leads from the battery. This way if a short was to ever happen through the winches solenoid, i would have the ability to shut the current off without removing a battery cable. This high current (amp) master battery switch was just what i was looking for. I installed it on the upper flat portion of the bumper wing. This switch is made of metal, so it will be durable in all weather situations, unlike some competitors that are made of plastic and are only suitable for under the hood installs.

Update: 07/13/17

There has been no degradation to the painted switch face, or the levers +/- engagement. It switches from on/off with a semi firm twist, just like when it was originally installed. This is a must product when seconds count, and you have to cut the currant fast. Winch cont-actors are one of the most susceptible parts to go south on you, and can cause cross voltage arcing and fire when they do. This switch is 'piece of mind' for that possibility. The other reason for this, is the contactor locking the winch into reverse, and not shutting OFF. This can damage your truck or bumper assembly, as the winch wont stop spooling in, even when the 'controller' is in NEUTRAL..

Update: 03/26/18...
Switch face plate is still fade free in hot and direct desert sun. The switch toggle lever is still tight, and the lever still has a nice "click" when moving the lever. It also has not loosened or slipped in it's mounting hole since installation. A switch like this should always be considered, when your dealing with the power of a electric winch. It is also something to consider in modern vehicles which can have a constant ECM memory drain, and vehicles that sit for long periods of time between use( click...click...click)!
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7 people found this helpful
Report
Reviewed in the United States on March 2, 2024
Size: 2-PostVerified Purchase

Top reviews from other countries

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Amazon Customer
5.0 out of 5 stars Good quality product.
Reviewed in Canada on March 20, 2022
Size: 2-PostVerified Purchase
Alfonso Sam
5.0 out of 5 stars Exactamente cómo está anunciado
Reviewed in Mexico on March 5, 2022
Size: 2-Post KitVerified Purchase
Robert S Brown
5.0 out of 5 stars Works so well I bought another one.
Reviewed in Canada on October 13, 2022
Size: 2-PostVerified Purchase
John
5.0 out of 5 stars Good Switch
Reviewed in Canada on September 6, 2020
Size: 2-PostVerified Purchase
Mike Como
4.0 out of 5 stars Heavy duty.
Reviewed in Canada on December 14, 2022
Size: 2-PostVerified Purchase
Customer image
Mike Como
4.0 out of 5 stars Heavy duty.
Reviewed in Canada on December 14, 2022
Install this on my camper is a battery disconnect so far I’m happy with it
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