BCW66G Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 75 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.8 A
• Collector Dissipation: 0.35 W
• DC Current Gain (h_fe): 160 to 400
• Transition Frequency, min: 170 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The BCW66G transistor can have a current gain of 160 to 400. The gain of the BCW66 will be in the range from 100 to 630, for the BCW66F it will be in the range from 100 to 250, for the BCW66H it will be in the range from 250 to 630.The complementary PNP transistor to the BCW66G is the BCW68G.You can replace the BCW66G with the FMMT619 or FMMT620.