The 2N3055 from STMicroelectronics is a through hole complementary power transistor in TO-3 package. This device manufactured in planar technology with "base island" layout and suitable for power linear and switching applications.
Collector to emitter voltage (Vce) is 70V at 100 ohm RBE
Collector current (Ic) is 15A
Power dissipation (Pd) is 115W
Collector to emitter saturation voltage of 3V at 10A collector current
DC current gain (hFE) of 5 at 10A collector current