I've _never_ heard of a CB "exploding". Failing to trip, failing to
reset, yes. Never exploding

I used to repair machines at a westinghouse power systems plant. they
built breakers and panels. they had troubles with a foreign company
building knocks offs. from the outside they looked genuine. Inside they
were crap.

I found out about this one day when walking thru the plant I heard a
explosion. Wierd the workers went on as nothing happened, I was ready
to run for my life.

just another test of a knockoff

properly built breakers shouldnt explode