2SB1056-R Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -140 V
• Collector-Base Voltage, max: -140 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -7 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 40 to 80
• 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 2SB1056-R transistor can have a current gain of 40 to 80. The gain of the 2SB1056 will be in the range from 40 to 200, for the 2SB1056-P it will be in the range from 100 to 200, for the 2SB1056-Q it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SB1056-R might only be marked "B1056-R".The complementary NPN transistor to the 2SB1056-R is the 2SD1487-R.You can replace the 2SB1056-R with the 2SB1057 or 2SB1057-R.