TDK Corp has officially announced a process change in the epoxy coating of the ferrite toroid cores. The location of the epoxy coating of the toroidal ferrite cores is changing as of August 1, 2016. Before this date, the epoxy coating of the toroidal ferrite cores was done in Japan. After August 1, 2016, the epoxy coating of the toroidal ferrite cores will be in China. The technical specifications of the epoxy coating have not changed.
The manufacture of the toroid ferrite cores as to the electrical and mechanical specifications before coating has not changed. Samples of the process as it pertains to the epoxy coating in the China locations will be available as required.