2N2221 - Transistor NPN 60V 0,8A 0,5W 25/175ns TO18

Silicon planar epitaxial NPN transistors in Jedec
TO-18  metal cases. They are designed for high-speed
switching applications at collector currents up to 500 mA,
and feature useful current gain over a wide range of collector
currentlow leakage currents and low saturation voltages.