For components used in electrical engineering and for electronics high conductivity values, a favourable bending and softening behaviour as well as the easy workability of a material are more and more required. However, all these conditions cannot be fulfilled by one single material. For this reason a number of different alloys were developed in the course of time whose properties meet the respective requirements and therewith satisfy various ranges of application. Beyond that this development opened up additional application fields. Here particularly the energy technique has to be mentioned. This publication describes the currently most commonly used copper materials for electrical engineering and electronics, their properties and ranges of application. Some significant examples out of their whole variety of practical use are demonstrated.