BUX48B Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 600 V
• Collector-Base Voltage, max: 1200 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 175 W
• DC Current Gain (h_fe): 15 to 50
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.You can replace the BUX48B with the BUX48C.