BCX55 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 1.2 W
• DC Current Gain (h_fe): 63 to 250
• Transition Frequency, min: 130 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The BCX55 transistor can have a current gain of 63 to 250. The gain of the BCX55-10 will be in the range from 63 to 150, for the BCX55-16 it will be in the range from 100 to 250.The BCX55 transistor is marked as "BE".The complementary PNP transistor to the BCX55 is the BCX52.You can replace the BCX55 with the 2SC3444 or BCX56.