MJ423 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 400 V
• Collector-Base Voltage, max: 400 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 125 W
• DC Current Gain (h_fe): 30 to 90
• Transition Frequency, min: 3 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 MJ423 with the 2N6678, BUX48, BUX48A, BUX80, BUX81, BUY69A, BUY70A, MJ12022, MJ8504 or MJ8505.