Device for protecting against overcurrents in electric circuits and uses of said device in a fuse link and in a related limiting fuse as well as in fuses for protecting semiconductors

摘要

An overcurrent protection device comprises a current input terminal; a central terminal for output of current overshoots; and a terminal for output of non-impulse currents connected to a voltage of the central terminal. An electrical conductor element is connected between the input and output terminals at a reduced self-induction when operating without current overshoots. When current overshoots are present at the input terminal, the conductor produces a high drop of induction voltage between the input and output terminals. The central terminal is arranged in the vicinity of the input terminal at a distance that may be regulated. When due to current overshoot, the inductive voltage drop between the input and the non-impulse current output terminals exceeds the dielectric strength of the material present between the input and central terminals, an arc is generated between the input and central terminals to prevent the flow of current overshoots through the conductor element.