A mate of mine has a three phase supply in his works, one of the single phase breakers is getting slightly warm and tripping randomly. It's not aDIN rail mount, the breakers have clips at each end, one on to a locating rail and the other to the busbar. Seems to be an obsolete design (there are a few on eBay but not the right rating). Anyone know of any possible suppliers? I'm not even sure of the correct name for them.