Enhance the protection capability of intentional electro magnetic interference with Zinc Oxide sintered gas discharge tube

A proposed gas discharge tube (GDT) including two electrodes and one hollow insulator ring with extra Zinc Oxide (ZnO) sputtered surface is studied. The insulating ring of a GDT has variable or non-linear resistance characteristics. In comparison to the conventional design, the proposed GDT can provide early triggering capability during fast IEMI introduced and results a smaller residual surge current.