For filtering interference in AC input to power supplies ( both linear and switching ) I was searching for common mode choke coils. One such sample can be seen here:



Question is what is the criteria(s) for selection of such coils ? MuRata alone has a huge range of PLA10, PLH10 etc. The obvious and basic criteria are the rated current and voltage of these items. But apart from those what else will be the criteria that one has to take care?

Any pointers in this regard will be educative and helpful

Thanks

Raghu