IRFB38N20DPBF-VB IRFB38N20P IRFB3O77PBF IRFB4010 IRFB4013PBF IRFB4019 IRFB4019 其他被动元件 IRFB4019PBF IRFB4019PBF M IRFB4019PBF MOS(场效应管)