In summary, GDTs are used as robust overvoltage protectors. They are now increasingly used as a board level protection components due to their extremely low capacitance and their availability in surface mount packaging. Bourns® GDTs are highly reliable, long life components which are equally suited for primary and board level protection. Bourns recently released symmetrical and high voltage product targeted for board level protection and will release a line of fast turn-on devices in the near future.