We welcome any suggestions and queries on the component via our contact channels.Silicon PNP transistor in a TO-92 Plastic Package Again, it is paramount in TV and other common electronic appliances.Ībove is extensive coverage of the pinout, principle of operation, and applications of the 2N3904 Bipolar Transistor.Also valuable for sensor circuits, Darlington Pairs, and Driver Modules such as LED driver and Relay Driver.It’s essential in amplifier modules such as Audio Preamplifiers and the audio Amplifier Stages.The module is helpful in the following applications. Lastly, the formula below indicates calculating the transistor’s DC gain when it functions as an amplifier.Ĭurrent Gain = Collector Current ÷ Base Current. The standard emitter amp is the most common of the three listed above. Besides, three main amplifier circuit configurations are as follows: As an amplifier, it can be a power amplifier, voltage amplifier, or current amplifier. The transistor will operate as an Amplifier when it functions in the active region. RB= VBE ÷ IB, whereby RB is the resistor value, VBE is the base pin voltage (5V), and IB is the emitter current. The following formula is handy in deducing the correct resistor value that you should use: Therefore, connecting a resistor in series with the transistor’s base pin is imperative. The maximum biasing current for these functions is 5mA, and supplying a higher current than this will destroy the power transistors. Thus, in forwarding transistor bias, the transistor is an open switch, while in reverse discrimination, it’s a closed switch. When operating as a switching, the transistor will function in the Saturation and Cut-Off Region. But primarily, you can use it either as each of the following: 2n3904 pins-As a switch The 2N3904 is useful in an extensive range of applications. 2N3904-based electronics projectsįig 3: Power transistors on the black surface
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