The utility model discloses a current transformer data plate, including memory chip and the insulation protective layer of parcel in this memory chip outside who is used for taking notes the current transformer relevant information. Because insulation protective layer parcel outside and be the nonmetal at memory chip, therefore memory chip can not receive environment humiture and electromagnetic environment's influence to higher life has. In addition, in practical application, the adjustment information in the time of can be with current transformer's body information and installation is all saved in memory chip to guarantee current transformer's body information and corresponding of adjustment information, thereby effectively avoid when changing current transformer, because of current transformer installation mistake, and arouse overload protection device malfunction, distant place measurement and measurement mistake etc. And then influence safe operation of power system's the condition.