SL100 is a general purpose, medium power NPN
transistor. It is mostly used as switch in common emitter configuration.
The transistor terminals require a fixed DC voltage to operate in the
desired region of its characteristic curves. This is known as the
biasing. For switching applications, SL100 is biased in such a way that
it remains fully on if there is a signal at its base. In the absence of
base signal, it gets turned off completely.
The emitter leg of SL100 is indicated by a protruding edge in the
transistor case. The base is nearest to the emitter while collector lies
at other extreme of the casing.
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