Device for protecting against surge/excess voltage has first and second electrodes and an air breakdown spark gap between both electrodes.

摘要

An arc occurs as an air breakdown spark gap (3) ignites between a first (1) and a second (2) electrode. A series circuit for a voltage-switching element (4) and an ignition element (5) is set up between the first and the second electrodes. The voltage-switching element can be a varistor, a suppressor diode or a gas-filled excess-voltage charge eliminator, or a combination of these.