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EFX Circuit Breaker

For 4- to 1/0-gauge wire (200-amp)

3 Reviews | 1 question - 4 answers

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Item # 142CBM200

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Our take on the EFX Circuit Breaker

This EFX circuit breaker will protect your power wiring and your vehicle just as well as a fuse would. Even better, you can reset it when some temporary glitch triggers it off, instead of having to spend time and money getting a new fuse.

Resettable safety precaution

This EFX circuit breaker will protect your power wiring and your vehicle just as well as a fuse would. Even better, you can reset it when some temporary glitch triggers it off, instead of having to spend time and money getting a new fuse.

Security for your stereo

This circuit breaker will also let you disable your expensive audio system when you park, so no one can play with your gear when you leave your vehicle in an attended garage, use valet parking, or drop it off for detailing. This breaker works in 4- to 1/0-gauge wire applications and features binding posts that accept ring terminal connectors, like EFX crimp-on ring terminals. Toothed lock washers ensure good electrical conduction. Warranty: 1 year.


EFX Circuit Breaker Reviews

Average Customer Review(s):

(3 Reviews)

EFX Circuit Breaker

Chad from Illinois on 6/12/2017

Crutchfield Customer Review (What's this?)

Cant deal with engine bay heat. The mechanical mechanism that keeps the reset locked in comes undone when it gets hot



EFX Circuit Breaker

chris from Denton, TX on 1/7/2017

Crutchfield Customer Review (What's this?)

Does what is suppose to do, good price and would buy again

Pros: Does its job

Cons: None

EFX Circuit Breaker

Guest from Charlottesville, VA on 9/9/2016

Works great much better than fuses just what I needed if u have a large amp this is wat u need




Hands-on research

Product Research


Overview: The Scosche EFX CBM200 is a 200A circuit breaker for protecting your car stereo system, and your vehicle, from a dangerous short circuit. The circuit breaker is mounted in a high-temp Bakelite housing. Using a circuit breaker eliminates the need for constantly changing blown fuses. If a short circuit occurs, the circuit breaker will safely and instantly disconnect your electronics. A red lever will indicate that the circuit breaker has activated. To reset the breaker, simply return the lever to the normal position. A manual disconnect button is also included to allow you to manually break the circuit whenever you want. The base has two holes for mounting the circuit breaker with screws or wire ties.

Wire Connections: The CBM200 circuit breaker has two 1/4" x 7/16" long studs that will accept ring terminals with 1/4" inside diameter. Two 7/16" Keps nuts (nut with star washer) are included for securing the ring terminals. Rubber caps, tethered to the circuit breaker, are for covering the bolt to avoid accidental contact.

Our Product Research Team

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I prefer a circuit breaker over a fuse. It will not need replaced if there is an issue. I also work in the circuit breaker industry. [ BOB  Dec 01, 2018 ]
Testing it out. [ Kyle  Oct 23, 2017 ]
Meets requirement for supplying power to 2 JL Audio amplifiers. [ U  Aug 31, 2017 ]
You don't have to replace fuses. It's a better choice.. [ caleb young  Jun 23, 2017 ]
Replacing fuses gets old and expensive! [ Ben  Oct 01, 2018 ]
I am going to use this as a second check in my wiring setup. Might not be needed but I am not going to take that chance. [ Brian  Feb 22, 2018 ]
works like a fuse but can be reset instead of replaced. [ James  Jan 07, 2018 ]
I needed a fuse/circuit breaker for my amp using 4 awg wire and these are much better than inline fuses. Will be powering a 1200W amp. [ Clyde  Aug 07, 2016 ]
Need fuse for my amp that is 120 amps but this is the closest I could get to that number for the price. [ Gary  May 12, 2016 ]
better than fuse [ TYRONE  Feb 03, 2019 ]
Replacing fuses gets old and expensive. [ Ben  Oct 01, 2018 ]
I really use this primarily when you bring my truck in for service. I flip this breaker so my system is not in any danger of being played. [ Brian  Aug 28, 2018 ]
It's better then just a fuse [ Carl  May 24, 2018 ]

1 question already asked

Depends on how much current or amperage the amplifier will pull. Most amp manuals state what size fuse or circuit breaker is needed. [ Chad  Aug 24, 2017 ]
Devide your total number of watts by 10 is a good way. For example 1000 watts devided by 10 would be 100. So a 100 amp breaker would be fine. [ caleb young  Aug 23, 2017 ]
The amperage load that you are going to have you want to have wire and a breaker at the battery to handle it [ Matthew  Aug 22, 2017 ]
Calculate expected load using this link, then buy a circuit breaker larger than that. [ John michael  Aug 22, 2017 ]

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