do they still have all the electrical and mechanical charecteristics of a normal Mcb then? Who makes them?
No, they're just ordinary switches, without any tripping mechanism, only built for DIN rail mounting.
I think most breaker manufacturers also do switches, I've found them at the ABB web site, without any specific model # though. They're listed under 'modular DIN rail components'.
I never used them personally, but I've seen some old Austrian F&G brand and I read a rather hefty discussion at a German board which concluded using MCBs as switches is _not_ up to code since the frequent operation _might_ wear it out to a point where it wouldn't trip on faults any more. From personal experience I can say nuisance tripping is much more likely.
