2N3904 – NPN Transistor

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2N3904 – NPN Transistor
The 2N3904 is a common NPN bipolar junction transistor used for general purpose low-power amplifying or switching applications. 2N3904 is a very high quality NPN bipolar junction transistor (BJT). It is designed for low current and power, medium voltage, and can operate at moderately high speeds. This transistor is low cost, widely available and sufficiently robust to be of use by experimenters and electronics hobbyists. When looking at the flat side with the leads pointed downward, the three wires emerging from the bottom are connected to, from left to right, the emitter, the base and the collector. Some manufacturers mark “EBC” on the molded part, but all are required to have those connections for a part which is a “2N3904”. It is a 200 mA, 40 volt, 625 milliwatt transistor with a transition frequency of 300 MHz, with a minimum beta or current gain of 100 at a collector current of 10 mA. It is used in a variety of analog amplification and switching applications
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