View 2sb1580 datasheet:

2SB1580 / 2SB1316 / 2SB1567 Transistors Power Transistor (-100V , -2A) 2SB1580 / 2SB1316 / 2SB1567 Features External dimensions (Units : mm) 1) Darlington connection for high DC current gain. 2SB1580 4.0 2) Built-in resistor between base and emitter. 1.0 2.5 0.5 3) Built-in damper diode. (1) 4) Complements the 2SD2195 / 2SD1980 / 2SD2398. (2) (3) (1) Base(Gate) (2) Collector(Drain) Absolute maximum ratings (Ta = 25°C) ROHM : MPT3 (3) Emitter(Source) Parameter Symbol Limits Unit EIAJ : SC-62 Collector-base voltage VCBO -100 V Collector-emitter voltage VCEO -100 V Emitter-base voltage VEBO -8 V -2 A(DC) Collector current IC -3 A(Pulse) ?1 2SB1316 2SB1580 2 W ?2 1 5.5 1.5 Collector 2SB1316 power PC 10 W(Tc=25°C) dissipation 2W 2SB1567 0.9 20 W(Tc=25°C)