2SB1023 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -40 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 2000
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SB1023 might only be marked "B1023".The complementary NPN transistor to the 2SB1023 is the 2SD1413.You can replace the 2SB1023 with the 2SA1258, 2SA1259, 2SB1024, 2SB1223, 2SB1224, 2SB1225, 2SB1250, 2SB1250-P, 2SB1250-Q, 2SB674, 2SB675, 2SB751-P, 2SB751-Q, 2SB751A-P, 2SB751A-Q, 2SB880, 2SB881, 2SB882, 2SB950, 2SB950-P, 2SB950-Q, 2SB950A, 2SB950A-P, 2SB950A-Q, 2SB951, 2SB951-P, 2SB951-Q, 2SB951A, 2SB951A-P or 2SB951A-Q.