The 2N2222A is one of the most widely used general-purpose NPN switching and amplifying transistors ever produced, and it shows up constantly in vintage radio, amplifier, and effects-pedal circuits. This 10-pack of TO-18 metal-can 2N2222/2N2222A transistors (40V, 0.8A) is exactly what you need on hand for board-level repairs on transistor radios, early solid-state amps, and DIY pedal builds.
The metal TO-18 case offers better heat dissipation and shielding than the plastic TO-92 equivalents, which matters in tightly-packed vintage chassis. Handy to keep a few spares in the parts drawer — these fail more often from age and heat cycling than almost any other component in old solid-state gear.
