The terminology you are using is not common in North America.
Originally Posted by Yuyu_XX
1P - is a single set of contacts which have overcurrent protection
1P +N - is two sets of contacts, one has overcurrent protection and the other is simply a switch. In the US we call this type of breaker a 2-wire Switched Neutral
2P - is two sets of contacts, both with overcurrent protection
3P - is three sets of contacts, all with overcurrent protection
3P + N - is four sets of contacts, three with overcurrent protection and the fourth is simply a switch
4P - is four sets of contacts, all with overcurrent protection
You can find more information by looking at literature from manufacturers that make both European and North American equipment. Try someone like Schneider Electric and their Merlin Gerin breakers.
Just because you can, doesn't mean you should.