2N5991 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 12 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 20 to 120
• Transition Frequency, min: 2 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-127

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N5991 is the 2N5988.