2N1550 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -30 V
• Collector Current − Continuous, max: -15 A
• Collector Dissipation: 106 W
• DC Current Gain (h_fe): 10 to 30
• Operating and Storage Junction Temperature Range: -65 to +110 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.You can replace the 2N1550 with the 2N1551 or 2N1552.