BC547

The BC547 is a NPN bipolar junction transistor (BJT). It was designed as a general purpose transistor for small signal circuits.

A BC547 transistor. (Enlarge)

Circuit symbol NPN transistor. Symbol Description Value Type NPN-BJT VCE Max. collector-emitter voltage 45 V IC Max. collector current 100 mA hFE, β Gain 110 - 800 Casing TO92 Technical data of a BC547

Notes...

• In your experiments, you can also use the BC546, BC548, BC549 or BC550.
• The complementary PNP transistor is the BC557.

You find a detailed description of how to connect the transistor in the topic "Transistor".