Pyrotechnic Switch with Fuse Function


  • A. Ehrhardt DEHN + SÖHNE
  • S. Wolfram TU Ilmenau



fuse, pyrotechnic switch, impulse current, numerical simulation, SPD


The article will present the combination of a low-voltage fuse with a pyrotechnic switch in compact design. The limited switching capacity of the very simple pyrotechnic switch is increased considerably when combined with a fuse which has classical passive time/current characteristic and high switching capacity. FEM calculations will demonstrate the functional principle and the passive and active characteristics of functional models will be examined. Switching behaviour with different overcurrents in case of passive or active triggering will be discussed on the basis of measuring results. The behaviour of such a fuse with high impulse currents will also be presented.


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