This phase is called the saturation zone, and the typical voltages allowed for collector-emitter (VCE) or collector-base (VCB) are 40V and 60V, respectively. When the 2N3904 is fully biased, it allows a maximum current of 200mA to flow through the collector and emitter. To bias the transistor, we must supply current to the base pin, which should be limited to 5mA. The maximum current that can flow through the collector pin is 200mA, so we cannot use this transistor to connect a load that consumes more than 200mA. The gain value of the 2N3904 is 300 This value determines the amplification capability of the transistor. Therefore when the base pin is grounded, the collector and emitter will remain open (reverse bias) and will close (forward bias) when a signal is supplied to the base pin. Too much positive bias will usually result in too much collector current, which usually leads to saturation. The amount of positive bias must be controlled for the specific application. It should be noted that the substrate is a positive (P) type material, and the emitter is a negative (N) type material. Generally, the 2N3904 transistor requires a positive bias from the base to the emitter, which means a positive potential on the substrate for the emitter. The bias is the idle current at the transistor terminals. A small change in base current results in a hundredfold change in collector current, which can be translated into voltage or power changes. This illustrates how the 2N3904 transistor is an amplifier. For a current gain of 100, a change in base current of 0.001 amps (a) results in a change of 0.1 amps at the collector. The various parameters of the 2N3904 transistor are referred to as β or current gain, which is the ratio of collector current to base current.
Depending on the circuit configuration, a load or equivalent load can be connected to the emitter or collector. The emitter and collector are the main terminals of the 2N3904 transistor. The 2N3904 transistor has three terminals: an emitter, base, and collector. A larger collector current can be generated by injecting a small base current into the 2N3904 transistor.
This small transistor is the counterpart of the 2N3906 transistor, a positive-negative-positive (PNP) transistor. It can be used for audio signals and medium-speed switching applications. The 2N3904 transistor is a bipolar negative-positive-negative (NPN) transistor usually suitable for negative ground circuits. We also provide you with a 2N3904 Datasheet pdf. This article will introduce you to the pinout, model, Introduction, features, specifications, applications, equivalent, and dimensions of the 2N3904 transistor.
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