BC107A Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.3 W
• DC Current Gain (h_fe): 110 to 220
• Transition Frequency, min: 150 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The BC107A transistor can have a current gain of 110 to 220. The gain of the BC107 will be in the range from 110 to 450, for the BC107B it will be in the range from 200 to 450.The complementary PNP transistor to the BC107A is the BC177A.The 2SC1623 (SOT-23), BC847 (SOT-23), BC847A (SOT-23), BC847AW (SOT-323), BC847W (SOT-323), BC850 (SOT-23), BC850A (SOT-23), BC850AW (SOT-323), BC850W (SOT-323) and KSC1623 (SOT-23) is the SMD version of the BC107A transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC107A with the 2SC979 or BC377.