A microplasma current switch is provided to reduce driving voltage and power consumption by controlling the area of anode and cathode exposed to plasma. A plasma generating unit is installed inside a plasma generation space, and an exposure cathode electrode(304) is installed within the plasma generation ball. An exposure anode electrode(306) is exposed by the area smaller than that of the exposure negative electrode. The exposure anode electrode and the exposure cathode electrode are installed to be separated with each other. The exposure anode electrode is electrically conducted with the exposure cathode electrode by generated plasma.
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