While the link I attach below is obviously one companies attempt to make you aware that the Classified Breakers do have some limitations in it’s use I do find it helpful to know the information because not all “Classified Breakers” are acceptable in all panels. The reason the manufacturers of the “Classified Breakers” supply a list is because the selection is limited.
While many in both the HI industry and the electrical industry have come to openly accept a “Classified” circuit breaker in a replacement situation, it is less known that you really do need to check the list before accepting it so that you truly know that it is acceptable on that panelboard ( or loadcenter).
Whats also important to note and I found it well documented in the literature posted below, that it is nearly impossible to achieve any sort of “series” ratings on “Classified” circuit breakers since they are not tested in combinations required to meet this rating. That can only be achieved by an OEM who tests them for such an application.
Anyway it is a very nicely done (be it to serve a competitive purpose mind you) document.