Glass encapsulated for resistance against harsh environments/processes, Glass Encapsulated TransGuard® and TransGuard Automotive Series provide bi-directional overvoltage protection and EMI/RFI attenuation. These zinc oxide (ZnO)-based ceramic semiconductor devices exhibit sub 1 nsec response times to ESD strikes, offer multi-strike capabilities, and come in 1206, 1210, 1812, and 2220 chip sizes with energy ratings from 0.4–12 J and peak current ratings from 150–2,000 A.