2N5051 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 150 V
• Collector-Base Voltage, max: 150 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 25 to 100
• Transition Frequency, min: 10 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 2N5051 with the 2N5038, 2N5038G, 2N5052, 2N6676, 2SC1114, BUY69C, BUY70C, MJ15011 or MJ15011G.