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

Yes. I use it as a switch to kill the battery circuit on my tractor. BTW. It's well built and sturdy.

The lugs are 1/2" the biggest cables avaiable are 5/16" & is this switch overkill for a average car?

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.

Is this offered in a 2 post insted of 4 post?

Not sure you need to research it more

How do you install on a 08 frieightliner d60 4 battery setup?

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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

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

Product ID: 105332386

Details

Brand
Fastronix
Connector Type
Auxiliary
Contact Type
Normally Open
Current Rating
300 Amps
Item dimensions L x W x H
5 x 2.63 x
Material
Copper

⚡300A Power Rating

🔌Dual Pole Config

🔒Index Pin Secure

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 81.02

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ireland.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

🔋 Power Up Your Setup with Confidence!

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.

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.

Specifications

ASIN	B07L2JRHRQ
Actuator Type	Rotary
Best Sellers Rank	#98,760 in Automotive ( See Top 100 in Automotive ) #166 in Automotive Replacement Battery Switches
Brand Name	Fastronix Solutions
Circuit Type	2-way
Connectivity Protocol	X-10
Connector Type	Auxiliary
Contact Material	Copper
Contact Type	Normally Open
Control Method	Touch
Current Rating	300 Amps
Customer Reviews	4.7 4.7 out of 5 stars (342)
International Protection Rating	IP67
Item Dimensions	5 x 2.63 x 2.63 inches
Item Weight	0.01 Ounces
Manufacturer	Fastronix Solutions
Material Type	Copper
Model	300A
Mounting Type	Face
Number of Items	1
Number of Positions	2
Operating Voltage	12 Volts
Operation Mode	ON-OFF
Specification Met	iec
Switch Type	Rotary
Terminal	Pin
UPC	635414975837
Unit Count	1 Count
Upper Temperature Rating	185 Degrees Fahrenheit
Wattage	3600 watts

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.