2SB1559 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -150 V
• Collector-Base Voltage, max: -160 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -8 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 5000 to 30000
• Transition Frequency, min: 65 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The 2SB1559 transistor can have a current gain of 5000 to 30000. The gain of the 2SB1559-O will be in the range from 5000 to 12000, for the 2SB1559-P it will be in the range from 6500 to 20000, for the 2SB1559-Y it will be in the range from 15000 to 30000.Sometimes the "2S" prefix is not marked on the package - the 2SB1559 might only be marked "B1559".The complementary NPN transistor to the 2SB1559 is the 2SD2389.You can replace the 2SB1559 with the 2SB1560 or BDV66D.