The 2N3055T3BL is an NPN type transistor with a TO-3 RoHS package manufactured by SPS. It is designed for general purpose power switching, linear amplification, and general purpose switching. It has a maximum collector current of 15A and a maximum voltage rating of 60V. The 2N3055T3BL also has a low saturation voltage, an optimal power dissipation, and a good temperature stability. It is often used for power supplies, general purpose switching, linear amplifiers, and other applications.