2SB1057 Bipolar Transistor

Characteristics of 2SB1057 Transistor

  • Type: PNP
  • Collector-Emitter Voltage, max: -150 V
  • Collector-Base Voltage, max: -150 V
  • Emitter-Base Voltage, max: -5 V
  • Collector Current − Continuous, max: -9 A
  • Collector Dissipation: 100 W
  • DC Current Gain (hfe): 40 to 200
  • Transition Frequency, min: 20 MHz
  • Operating and Storage Junction Temperature Range: -55 to +150 °C
  • Package: TO-3PF

Pinout of 2SB1057

Here is an image showing the pin diagram of this transistor.

Classification of hFE

The 2SB1057 transistor can have a current gain of 40 to 200. The gain of the 2SB1057-P will be in the range from 100 to 200, for the 2SB1057-Q it will be in the range from 60 to 120, for the 2SB1057-R it will be in the range from 40 to 80.

Marking

Sometimes the "2S" prefix is not marked on the package - the 2SB1057 might only be marked "B1057".
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