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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.







| 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 |
K**N
Heavy duty . Semi truck use.
GOOD QUALITY
C**N
This thing is tough!
This switch turns on and off with a pleasant, distinct "snick." I am running a 200amp alternator with two Optima batteries on my race car. It was easy to modify the switch handle of this product to accept a hinged extension rod connected to a remote kill-handle by the taillight outside of the car. This puts mod puts extra tension on the switch body, but this thing is so solid that it doesn't seen to care.
L**A
Works great
I like these battery disconnect switches and they work great and easily. The only drawback is the need to drill a hole to mount the main shaft through, which is just over a 1/2" in diameter. When drilling through the steel panels of construction equipment, this can be a real chore. Assembly and wiring is straight forward. There is a definite 'positive' click when you flip the switch, giving a solid confidence the switch is where you want it, either in the 'On' or 'OFF' position.
K**S
Holds up to the weather.
Pretty stout, I've installed about 4 or 5 of them and they've seem to be holding up.
J**O
Bueno
D**Y
as advertised. should work just great !!!!!!
after ordering a another switch and looking at that very small, over rated piece of plastic. this one was just what I was looking for and went in the truck like it should have. very sturdy metal with all the pin for install and keeping right where it should be . hoping for long life to shut my winch on and off and they even returned a email, very fast to me ... GREAT CUSTOMER SERVICE
I**T
perfect replacement
Interesting problem - old switch prodiced slightly high resistance under load - resulting in loss of charge to coach house batteries. Charge voltage at batteries would never be high enough due to 1 volt voltage drop across old switch ! This replacement shows essentially zero voltage drop under high current load. Problem solved - now house batteries are fully charged from alternator.
S**N
Very nice shut off switch
Very well made . Heavy construction allows high amperage applications. I like that it has a locator pin to keep the switch from spinning when using. All I had to do was drill a small hole next to the mounting hole to install .Priced right. I used this as a battery shut off in my travel trailer , when not using. Good purchase.
Trustpilot
2 weeks ago
2 months ago