2SC1809 transistor equivalent, silicon npn transistor.
fT ，，，。 High fT, low output capacitance, low base time constant and high gain, excellent noise characteristics.
/ Applications 。 FM radio RF amplifier applications.
.
。 FM radio RF amplifier applications.
/ Equivalent Circuit
/ Pinning
1 23
PIN1：Base
PIN 2：Collector
PIN 3：Emitte.
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