Some ride-ons come with a low amperage self-resetting breaker. When modifying motors or batteries we recommend changing it out for this 40 amp one. For vehicles that have fuses we do not recommend replacing them with this.
I installed this on my sons power wheels and it works great. Only downside is that when it does what it is designed to do (break the circuit) it resets immediately. My son being 5 years old didnt know what the power wheels stopped and kept his foot on the pedal and burned out the motor that was causing the fuse to break in the first place.