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BC547 Transistor Explained / Description:

BC547 is a general-purpose BJT NPN transistor mostly used in electronics hobbyists and educational electronics projects. Besides these uses, it can also be used in commercial circuits. It comes in TO-92 packaging and the maximum output current this transistor can handle is 100mA. The transistor is having very good DC current gain and low noise capabilities due to which is ideal to use in signal amplification stages. The typical saturation voltage is only 90 millivolts which is also a good sign to use it as a switch


Features / technical specifications:

  • Package Type: TO-92
  • Transistor Type: NPN
  • Max Collector Current(IC): 100mA
  • Max Collector-Emitter Voltage (VCE): 45V
  • Max Collector-Base Voltage (VCB): 50V
  • Max Emitter-Base Voltage (VEBO): 6V
  • Max Collector Dissipation (Pc): 500 miliWatt
  • Max Transition Frequency (fT): 300 MHz
  • Minimum & Maximum DC Current Gain (hFE): 110 – 800
  • Max Storage & Operating temperature Should Be: -65 to +150 Centigrade



Sensor Circuits

Audio Preamp circuits

Audio Amplifier Stages

Switching Loads under 100mA

Transistor Darlington Pairs

Radio Frequency Circuits


BC547 NPN Epitaxial Silicon Transistor

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