2N3055 MJ2955 COMPLEMENTARY SILICON POWER TRANSISTORS n STMicroelectronics PREFERRED SALESTYPES n COMPLEMENTARY NPN-PNP DEVICES DESCRIPTION The 2N3055 is a silicon Epitaxial-Base Planar NPN transistor mounted in Jedec TO-3 metal case. It is intended for power switching circuits, series and shunt regulators, output stages and high fidelity amplifiers. The complementary PNP type is MJ2955.