2N6546 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 300 V
• Collector-Base Voltage, max: 650 V
• Emitter-Base Voltage, max: 9 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 175 W
• DC Current Gain (h_fe): 12 to 60
• Transition Frequency, min: 35 MHz
• 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 2N6546 with the 2N6547, 2N6676, 2N6677, 2N6678, BUX48, BUX48A or MJ12022.