2SC3994 Bipolar Transistor

Characteristics of 2SC3994 Transistor

  • Type: NPN
  • Collector-Emitter Voltage, max: 800 V
  • Collector-Base Voltage, max: 1100 V
  • Emitter-Base Voltage, max: 7 V
  • Collector Current − Continuous, max: 25 A
  • Collector Dissipation: 300 W
  • DC Current Gain (hfe): 10 to 40
  • Transition Frequency, min: 15 MHz
  • Operating and Storage Junction Temperature Range: -55 to +150 °C
  • Package: TO-3P

Pinout of 2SC3994

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

Classification of hFE

The 2SC3994 transistor can have a current gain of 10 to 40. The gain of the 2SC3994-K will be in the range from 10 to 20, for the 2SC3994-L it will be in the range from 15 to 30, for the 2SC3994-M it will be in the range from 20 to 40.


Sometimes the "2S" prefix is not marked on the package - the 2SC3994 might only be marked "C3994".
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