IRF540NP IRF540NPBF IRF540NPBF C粉 IRF540NPBF IC IRF540NPBF M IRF540NPBF MOS(场效应管) IRF540NPBF MOSFET或IGBT IRF540NPBF MOSFET或IGBT开关IC IRF540NPBF(2) IRF540NPBF(CN)