MJE1661 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 90 W
• DC Current Gain (h_fe): 20 to 100
• Transition Frequency, min: 3 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 MJE1661 is the MJE1291.