I am trying to understand the whole circuit breaker v fuse thing. I found this on an Airstream forum:
When a fault developed, a fuse blows and cuts the power off completely until it is replaced (and the fault is found). The automatic resetting circuit breakers I think you are referring to keep trying to reset themselves and in doing so, keep sending power to the fault, over and over and over. Eventually something fails, like the wire insulation and then you have a potential fire.
Automatic resetting 12 volt circuit breakers are not a good solution at all for the circuits. There are a very few situations that they are useful, and even then, one can question that they be used.
I cannot recommend them.
Again, trying to understand cb's myself