Do they fit in your panel? My basic German tells me these are only DIN-Rail mount and I don't know of any UL panels that accepts DIN breakers (they accept DIN rail devices such as TVSS's). As these appear to be Euro-standard devices, they may a) be illegal for use in the US, b) not be voltage compatible, or c) requires a Euro fuse/breaker box which may not be compatible with US codes. I'm curious as to what an electrician has to say. I, also, would have an interest in these.