Product specification 2SA1748 Features High transition frequency fT. Small collector output capacitance Cob. 1 Emitter 2 Base 3 Collector Absolute Maximum Ratings Ta = 25 Parameter Symbol Rating Unit Collector-base voltage VCBO -50 V Collector-emitter voltage VCEO -50 V Emitter-base voltage VEBO -5 V Collector current IC -50 mA Collector power dissipation PC 150 mW Junction temperature Tj 150 Storage temperature Tstg -55 to +150 Electrical Characteristics Ta = 25 Parameter Symbol Testconditons Min Typ Max Unit Collector-base voltage VCBO IC = -10 ìA, IE = 0 -50 V Collector-emitter voltage VCEO IC = -1 mA, IB = 0 -50 V -5 Emitter-base voltage VEBO IE = -10 ìA, IC = 0 Collector-base cutoff current ICBO VCB = -10 V, IE = 0 -0.1 ìA Emitter-base cutoff current IEBO VCE = -10 V, IB = 0 -100 ìA hFE VCE = -10 V, IC = -2 mA Forward current transfer ratio Collector-emitter saturation voltage 200 VCE(sat) IC = -10 mA, IB = -1 mA Transition frequency fT Collector output capacitance Cob V 500 -0.1 -0.3 V VCB = -10 V, IE = 2 mA, f = 200 MHz 250 MHz VCB = -10 V, IE = 0, f = 1 MHz 1.5 pF hFE Classification AL Marking Rank Q R hFE 200 400 250 500 http://www.twtysemi.com [email protected] 4008-318-123 1 of 1