2N6472 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 90 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 125 W
• DC Current Gain (h_fe): 20 to 150
• Transition Frequency, min: 4 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 2N6472 with the KD503.