Ordering number : ENA1281 MCH4021 RF Transistor MCH4021 Package Dimensions Type No. Indication unit : mm (typ) 7020A-003 4 3 1 : Emitter 2.0 0.15 2 : Collector 3 : Emitter 43 GL 4 : Base 0 to 0.02 Top view 1 2 12 0.65 0.3 1 : Emitter 12 2 : Collector 3 : Emitter 4 : Base MCPH4 43 I -- V I -- V C CE C BE 150 140 120 120 100 90 80 60 60 40 30 20 I =0mA B 0 0 062 4 8 0 0.2 0.4 0.6 0.8 1.0 1.2 Collector-to-Emitter Voltage, V -- V IT13901 Base-to-Emitter Voltage, V -- V IT13902 CE BE h -- I Cre -- V FE C CB 2 1.0 f=1MHz 7 100 5 7 5 3 3 2 2 253 7 253 7 23 23 5 7 23 5 7 1.0 10 100 0.1 1.0 10 Collector Current, I -- mA IT13903 Collector-to-Base Voltage, V -- V IT13904 C CB No. A1281-2/9 V =5V CE 1V 1.2mA 0.9mA 0.6mA 0.3mA 1.5mA 5V V =1V CE DC Current Gain, h Collector Current, I -- mA FE C 2.1 0.85 0.25 0.07 0.25 1.6 Reverse Transfer Capacitance, Cre -- pF Collector Current, I -- mA C