Mysterious Failure of a Siemens Mini Circuit Breaker C6A (5SY41)

From one day to another this mini circuit breaker stopped working, I had been using it wrongly as a on/off switch and was wondering if there was a mechanism inside to disable it after too many on/off switches, as MCBs are only rated for a finite number of operations.

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#electronicscreators

#teardown #failure #mcb #minicircuitbreaker

[larslundbk]

Hello Mads It looks like the platin is blowen away, try look inside A New breaker⚡️Far

[chronicle_]

I have seen some breakers have a small contact between the two bars that is more resistant to eroding from the arcs. Maybe it broke free or was vaporized from so many switches?

[awsemad]

There is a problem in this mcb for sure
But keep in mind you can't achieve full contact when the case is open due to the movement of the rotation axis represented by the steel little stick