Überspannungsschutzelement

摘要

The protection element has a substrate (1) with a first electrode layer (2) and a second electrode layer (3) above it and at a distance (d) from it defined by the thickness of a separating layer (4), with a through hole (5) forming a gas-filled hollow chamber (6) between the electrode layers. The electrodes contain an electron emitting material with very low escape energy.