2N3643 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.35 W
• DC Current Gain (h_fe): 100 to 300
• Transition Frequency, min: 250 MHz
• Operating and Storage Junction Temperature Range: -55 to +125 °C
• Package: TO-105

Here is an image showing the pin diagram of this transistor.The PN3643 is the TO-92 version of the 2N3643.You can replace the 2N3643 with the 2N3569.