2N5154 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 70 to 200
• Transition Frequency, min: 70 MHz
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N5154 is the 2N5153.The BCP56 (SOT-223) and BCX56 (SOT-89) is the SMD version of the 2N5154 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2N5154 with the 2N5337 or 2N5339.