In addition, for its acronym BC It shows that it is a silicon transistor (B), for low frequency (C). The differences between the series were basically encapsulated, being the same inside. And it evolved from BC108, BC238, to what we now know as BC548 with an encapsulation cheaper type TO-92, and from here came variants such as the BC547. Later it would have a new plastic package and renamed with the code BC148. That package was considerably more expensive than the plastic equivalent TO-92, but the heat dissipation is better in the former. Initially it was named with the BC108 nomenclature and had a TO-18 type metal encapsulation (Transistor Outline package - case style 18 ). It is a bipolar junction transistor that was originally developed by Philips and Mullard between 19. If you are a maker, you like DIY and electronics, surely you have ever needed to use a BC547 transistor.
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