Small Signal Transistors (PNP)
♦ PNP Silicon Epitaxial Planar Transistors for switching and AF amplifier applications.
♦ These transistors are subdivided into three groups A, B and C according to their current gain.
The type BC556 is available in groups A and B, however, the types BC557 and BC558 can be
supplied in all three groups. The BC559 is a low-noise type available in all three groups. As
complementary types, the NPN transistors BC546 … BC549 are recommended.
♦ On special request, these transistors are also manufactured in the pin configuration TO-18.