BC107 is an NPN bipolar planner low power transistor which is mainly designed for general purpose switching and amplification purpose.

Characteristics of the BC107B bipolar transistor:

• Type - n-p-n

• Collector-Emitter Voltage: 45 V

• Collector-Base Voltage: 50 V

• Emitter-Base Voltage: 6 V

• Collector Current: 0.1 A

• Collector Dissipation - 0.3 W

• DC Current Gain (hfe) - 200 to 450

• Transition Frequency - 150 MHz

• Noise Figure - 2 dB

• Operating and Storage Junction Temperature Range -65 to +175 °C

• Package - TO-18

Datasheet:

https://www.st.com/resource/en/datasheet/cd00003228.pdf