BCW66H 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): 250 to 630
• 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 BCW66H transistor can have a current gain of 250 to 630. 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 BCW66G it will be in the range from 160 to 400.The complementary PNP transistor to the BCW66H is the BCW68H.You can replace the BCW66H with the FMMT619 or FMMT620.