BUX85 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 450 V
• Collector-Base Voltage, max: 1000 V
• Emitter-Base Voltage, max: 10 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 30
• Transition Frequency, min: 20 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.You can replace the BUX85 with the 2SC3446-N, 2SC3447-N, 2SC3749-N, 2SC3750-N, KSC5020-Y, KSC5021-Y or KSC5021F-Y.