2SB1161-S Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -160 V
• Collector-Base Voltage, max: -160 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -12 A
• Collector Dissipation: 120 W
• DC Current Gain (h_fe): 80 to 160
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3PF

Here is an image showing the pin diagram of this transistor.The 2SB1161-S transistor can have a current gain of 80 to 160. The gain of the 2SB1161 will be in the range from 60 to 200, for the 2SB1161-P it will be in the range from 100 to 200, for the 2SB1161-Q it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SB1161-S might only be marked "B1161-S".The complementary NPN transistor to the 2SB1161-S is the 2SD1716-S.You can replace the 2SB1161-S with the 2SA1673, 2SA1987 or 2SA1987-O.