Mixed Transistor Pack of 50 Pcs - 5 pcs Each of - 2N3904 2N3906 BC547 BC548 BC557 BC558 BF494 BD139 BD140 S8050

• 5 pcs each of
  
• 2N3904
  
• 2N3906
  
• BC547
• BC548
• BC557
• BC558
• BF494
• BD139
• BD140
• S8050
  

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.