Circuit arrangement for protecting electronic circuits against overvoltage

摘要

A circuit arrangement for protecting electronic circuits against overvoltage, having series stabilisation, has a VMOS transistor (2) as a series regulator which is fully driven up to a selected upper limit value of the input voltage. A disconnection controller (3, 6) drives the VMOS transistor (2) into the completely blocked state when a threshold switch (3) triggers as a consequence of the upper limit value of the input voltage being exceeded. <IMAGE>