2N6478 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 140 V
• Collector-Base Voltage, max: 160 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 2.5 A
• Collector Dissipation: 50 W
• DC Current Gain (h_fe): 25 to 150
• 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 2N6478 with the 2SD772, 2SD772A, 2SD772B, 2SD792, 2SD792A, 2SD792B, TIP41E, TIP41F, TIP42E or TIP42F.