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The following are some typical applications for this transistor:Īmplification: In low-power audio, video, and RF applications, the 2N3904 is frequently utilized as an amplifier. The 2N3904 NPN transistor is a widely used general-purpose transistor with a wide range of applications. The pin outs of the transistor 2N3904 are given in the following diagram.

The above data is quite sufficient and adequate for any electronic hobbyist for understanding the transistor 2N3904 safely and correctly.

The minimum amount of voltage required to trigger the base of the device is 0.65 volts, its also called the case/emitter saturation voltage.

The minimum amount of voltage required for activating the collector is 0.2 volts, its also known as the collector-emitter saturation voltage.

The hFE or the forward current gain of the device is between 100 to 300.

Similarly the minimum amount of current required to keep the collector load switched is also 50nA.

Minimum current required for keeping the base of the transistor activated is 50nA.

The maximum base to emitter breakdown voltage is 6 volts.

Similarly the maximum collector to base breakdown voltage is 60 volts.

Maximum collector to emitter breakdown voltage for a 2N3904 transistor is 40 volts.

Other Useful Characteristics of this device are discussed below:

The maximum allowable collector to emitter or the Ic must not exceed 200mA.

The Vcbo or the maximum tolerable voltage across collector-base is 60 volts.The Vceo or the maximum tolerable Collector-Emitter voltage is 4 volts.The absolute maximum ratings of this transistor may be understood from the following data: It's dynamic range may include a current handling capability of more than 100mA for switching applications and a 100MHz frequency handling capacity fits with amplification purposes. The transistor 2N3904 comes under the category of NPN small signal, low power, general purpose transistor, mainly applicable for switching and for signal amplification.