What is the fullform of BC 107 in transistor?
The First letter indicates the construction-material.
B for Silicon and C for germanium
The second letter in transistor’s marking describes its primary use:
C – low and medium power LF transistor,
D – high power LF transistor,
F – low power HF transistor,
G – other transistors,
L – high power HF transistors,
P – photo transistor,
S – switch transistor,
U – high voltage transistor.