2N3904
Sign in to savethumb|A 2N3904 made by Motorola. The pinout from left to right is: Emitter, Base, Collector. thumb|A 2N3904 (lower left) in a TO-92 package on a breadboard
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thumb|A 2N3904 made by Motorola. The pinout from left to right is: Emitter, Base, Collector. thumb|A 2N3904 (lower left) in a TO-92 package on a breadboard
The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. It is designed for low current and power, medium voltage, and can operate at moderately high speeds. It is complementary to the 2N3906 PNP transistor. Both types were registered by Motorola Semiconductor in the mid-1960s.
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