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三極管

用萬用表檢測帶阻三極管的簡單方法

發布日期:2022-10-09 點擊率:61

  用萬用表檢測帶阻三極管的簡單方法
  1、萬用表選R×1k檔。
  2、對NPN型帶阻三極管,黑表筆接c極,紅表筆接e極;對PNP型帶阻三極管,黑表筆接e極,紅表筆接c極、測c、e極間正向電阻為∞。短接b,c極,阻值小于50kΩ時,表明該管是好的、
  3、測b,c極及b,e極間電阻時,紅、黑表筆分別接b、c,b、e極測出一組數字,對調表筆測出第二組數字,其數值均較大時表明該管是好的。具體電阻值大小受管內Rb、Re影響而不盡相同。

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