The problem with circuit breaker that always confuses me is that they have rated current and breaking capacity. These smaller ones are normally only thermal breaker and not magnetic / thermomagnetic breaker. Magnetic breaker can shut off quickly but that also bad for esk8 build as surges might occur if we hit an obstacle and you don’t want your board to be randomly shut off. On the other hand, the thermal breaker are more common, cheaper and can handle surges just fine as their breaking capacity is depending on current versus time. However the problem of thermal breaker is that they normally breaking at 3 - 4x their rated current. So for instance 20A rated breaker switch will break at 100A within 1 - 2 seconds.
Also within thermal breaker switch, rated current of 20A means that if it given 21A it will not break instantly. They will break after 10000 seconds (for instance).
At this moment I am testing the 20A rocker breaker switch. This one will break 100A within 1 - 2 seconds.
Ideally I think some people here want about 30A - 50A so they will break at 200A within 1 - 2 seconds exactly perfect timing for VESC before blowing up above 240A (according to Vedder site).