2N3772 HIGH POWER NPN SILICON TRANSISTOR
TO-3 case, Regulator transistor, Ashtron power supplies use 2 or 4.
In larger 13.8 volt DC high current Power Supplies may use 6 or more.
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The 2N3772 is a silicon epitaxial-base NPN transistor mounted in a Jedec TO-3 metal case.
The 2N3772, replaces: 2N3771, 2N3772, & 2N3773.
They are intended for power supply regulator and switching applications.