tage IE=-50µA ;IC=0 VCEsat Collector-emitter saturation voltage IC=-0.5A ;IB=-50mA ICBO Collector cut-off current IEBO Emitter cut-off current VCB=-50V; IE=0 VEB=-4V; IC=0 hFE DC current gain IC=-0.1A ; VCE=-3V COB Output capacitance IE=0; VCB=-10V;f=1MHz fT Transition frequency IE=50mA ; .