2N1557 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -20 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -20 V
• Collector Current − Continuous, max: -15 A
• Collector Dissipation: 106 W
• DC Current Gain (h_fe): 50 to 100
• 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 2N1557 with the 2N1558, 2N1559 or 2N6469.