Circuit breaker with a field-effect transistor

摘要

As overload protection in field-effect transistors (FET) used as circuit breakers, it is proposed to allow a current limiting regulator to act on the control voltage of the FET above a certain load current value in such a manner that its residual resistance is increased. An overload protection responding to the residual voltage between drain terminal and source terminal of the FET will operate more quickly and in a more defined manner due to the increase in residual resistance produced by the current regulator.