.5mA IC=100mA, IB=5mA IC=10mA, IB=0.5mA IC=100mA, IB=5mA VCE=5V, IC=2mA VCE=3V, IC=0.5mA VCE=5V, IC=10mA Collector Base Capacitance Emitter Base Capacitance Noise Figure : BC237/238 : BC239 : BC239 CC.