BC300-6 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 120 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.85 W
• DC Current Gain (h_fe): 120 to 240
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.You can replace the BC300-6 with the 2N3019, 2N3499, 2N4033, 2N5337, 2N5339, 2SC503, 2SC503-GR or BC300.