2SB857-B Bipolar Transistor

Characteristics of 2SB857-B Transistor

  • Type: PNP
  • Collector-Emitter Voltage, max: -50 V
  • Collector-Base Voltage, max: -70 V
  • Emitter-Base Voltage, max: -5 V
  • Collector Current − Continuous, max: -4 A
  • Collector Dissipation: 40 W
  • DC Current Gain (hfe): 60 to 120
  • Transition Frequency, min: 15 MHz
  • Operating and Storage Junction Temperature Range: -45 to +150 °C
  • Package: TO-220

Pinout of 2SB857-B

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

Classification of hFE

The 2SB857-B transistor can have a current gain of 60 to 120. The gain of the 2SB857 will be in the range from 60 to 320, for the 2SB857-C it will be in the range from 100 to 200, for the 2SB857-D it will be in the range from 160 to 320.

Marking

Sometimes the "2S" prefix is not marked on the package - the 2SB857-B might only be marked "B857-B".

Complementary NPN transistor

The complementary NPN transistor to the 2SB857-B is the 2SD1133-B.

Replacement and Equivalent for 2SB857-B transistor

You can replace the 2SB857-B with the 2N6107, 2N6107G, 2N6108, 2N6109, 2N6109G, 2N6110, 2N6475, 2N6490, 2N6490G, 2N6491, 2N6491G, 2SA1010, 2SA1010L, 2SA1262, 2SA1488, 2SA1488A, 2SA1634, 2SA1634-D, 2SA1635, 2SA1635-D, 2SA1725, 2SA1726, 2SA489, 2SA768, 2SA769, 2SA770, 2SA771, 2SB1016, 2SB1017, 2SB1090, 2SB1097, 2SB1367, 2SB1368, 2SB565, 2SB565-B, 2SB566, 2SB566-B, 2SB566A, 2SB566A-B, 2SB595, 2SB596, 2SB633, 2SB633-D, 2SB703, 2SB703-R, 2SB703A, 2SB703A-R, 2SB707, 2SB707-O, 2SB708, 2SB708-O, 2SB747, 2SB747-Q, 2SB762, 2SB762A, 2SB858, 2SB858-B, 2SB870, 2SB870-R, 2SB942, 2SB942A, 2SB945, 2SB945-R, 2SB946, 2SB946-R, 2SB995, 2SB996, BD204, BD244A, BD244B, BD244C, BD304, BD536, BD538, BD540A, BD540B, BD540C, BD544A, BD544B, BD544C, BD546A, BD546B, BD546C, BD708, BD710, BD712, BD744A, BD744B, BD744C, BD798, BD800, BD802, BD808, BD810, BD908, BD910, BD912, BD950, BD952, BD954, BDT82, BDT82F, BDT84, BDT84F, BDT86, BDT86F, BDT92, BDT92F, BDT94, BDT94F, BDT96, BDT96F, BDX78, D44C10, D44C11, D44C12, D44C7, D44C8, D44C9, D45C10, D45C11, D45C12, D45C7, D45C8, D45C9, D45H11, D45H11FP, D45H8, KSA1010, KSA1010O, KSB1017, KSB1097, KSB596, KSB707, KSB707-O, KSB708, KSB708-O, KTB1367, KTB1368, NTE153 or NTE197.
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