This means that the terminals are designed to form pin-like structures where each pin represents a respective terminal. This transistor is characterized by a pinout structure. But, how are these terminals arranged and organized in a transistor system? Design and structure of 2N3904 NPN transistorĪs we have already mentioned, the 2N3904 NPN transistor comprises three terminals-base, emitter, and collector. Just like other NPN transistors, this one also has an emitter, base, and collector terminal. This configuration makes it possible for current to flow through this device from emitter to collector when there is a small voltage applied to its base terminal. The silicon material provides the P-type semiconductor while the copper provides the N-type semiconductor. The 2N3904 transistor is made of silicon and copper. It can be used for amplifying signals, acting as a switch, and even rectifying AC signals. The first thing to note is that this transistor is a general purpose NPN transistor. Now that you know what an NPN transistor is all about, let’s proceed to what matters. This property makes this kind of transistor an active device because it amplifies small signals into bigger ones. When a small voltage is applied to it, there will be no flow of current from emitter to collector when a large voltage is applied, there will be a large flow of current between emitter and collector. The base terminal controls whether current can flow from emitter to collector or not. The emitter terminal is where the current enters the base terminal and flows out through it to the other end of the emitter terminal. The collector terminal of an NPN transistor is where the current enters and flows out from the other end of the collector terminal. The transistor has three terminals, namely, collector, base, and emitter. NPN means that the PN junction is biased so that the N-type material is more conductive than the P-type material. Where to buy the 2N3904 NPN transistor?įirst things first, let’s understand the basics of an NPN transistor.Features and benefits of 2N3904 NPN transistor.Design and structure of 2N3904 NPN transistor.
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