DESCRIPTION
The 2N2218, 2N2219, 2N2221 and 2N2222 are silicon
planar epitaxial NPN transistors in Jedec
TO-39 (for 2N2218 and 2N2219) and in Jedec
TO-18 (for 2N2221 and 2N2222) 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 current,
low leakage currents and low saturation voltages.