Potential circuit board to read AC mains voltage.  F1 - 1/8A Pico-Fuse, R1 - 1M, R2 - 1k, U1 - AD629.

I think that it would work to remove the bimetal in a breaker and replace it with this board.  It would no longer be a breaker, but rather a switch with a really strong spring.  Does anyone have any insight into this type of circuit?