View 2sd1784 datasheet:

2SD1784 TOSHIBA Field Effect Transistor Silicon NPN Epitaxial Type (PCT process) (Darlington) 2SD1784 Micro Motor Drive, Hammer Drive Applications Unit: mm Switching Applications Power Amplifier Applications • High DC current gain: hFE = 4000 (min) (V = 2 V, I = 150 mA) CE C • Low saturation voltage: V = 1.5 V (max) (I = 1 A, I = 1 mA) CE (sat) C B Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Collector-base voltage VCBO 30 V Collector-emitter voltage VCEO 30 V Emitter-base voltage VEBO 10 V Collector current IC 1.5 A Base current IB 50 mA PC Collector power dissipation 1000 mW (Note) JEDEC ? Junction temperature Tj 150 °C JEITA SC-62 Storage temperature range Tstg -55 to 150 °C TOSHIBA 2-5K1A Note: 2SD1784 mounted on ceramic substra