BDT91 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 90 W
• DC Current Gain (h_fe): 20 to 200
• Transition Frequency, min: 4 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BDT91 is the BDT92.You can replace the BDT91 with the BDT91F, BDT93, BDT93F, BDT95 or BDT95F.