It is designed for low current and power, medium voltage, and can operate at moderately high speeds.ĢN3904 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin. The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. To get good and long term performance from this transistor it is suggested to not drive loads more than 100mA, always use a suitable base resistor, do not provide collector-emitter voltage more than 40V and always operate or store in temperatures above -55 centigrade and below +150 centigrade. When using as an amplifier it can be used in audio amplification stages, as an amplifier to drive small speakers, as an audio preamplifier and it can also be used in amplification stages of RF applications. The value of IB should not exceed mA.ĢN3904 can be used in any electronic applications which fall under its electrical characteristics, let suppose if you want to switch a load in an electronic application that requires current under 200mA then this transistor will work quite well and you can drive variety of loads with this transistor for example relays, high power transistors, LEDs, a portion of an electronic circuit etc. Where, the value of VBE should be 5V for 2N3904 and the Base current (IB depends on the Collector current (IC). The value of this resistor (RB) can be calculated using below formulae.
#BJT 3904 DATASHEET SERIES#
Anything more than 5mA will kill the Transistor hence a resistor is always added in series with base pin. As mentioned the biasing current should maximum of 5mA. As discussed a transistor will act as an Open switch during Forward Bias and as a closed switch during Reverse Bias, this biasing can be achieved by supplying the required amount of current to the base pin. When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above. When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulaeĭC Current Gain = Collector Current (IC) / Base Current (IB) Of the above types common emitter type is the popular and mostly used configuration. Some of the configurations used in amplifier circuits are It can amplify power, voltage and current at different configurations. General Announcement - 2D Barcoding (PDF)ĢN2222, S8050, 2N4401, BC537, SS9013 (Pin configuration of some transistors may different from 2N3904 therefore check pin configuration before replacing in a circuit)Ī Transistors acts as an Amplifier when operating in Active Region. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. Voltage - Collector Emitter Breakdown (Max)
A small current on the P doped layer transforms into a higher current on other two terminals.ĭiscrete Semiconductor Products Transistors - Bipolar (BJT) - Single.Collector layer is bigger in size than the other two layers and thus highly doped.The centred layer is very small in size and is low concentrated as compared to the other two N doped layers.These 3 layers are different from each other in terms of size and concentration of doping.single P doped layer embedded between two N doped layers. The maximum collector current of the transistor is 200mA therefore user can drive loads under 200mA in their electronic applications, Moreover 2N3904 also work good as an amplifier, the total device dissipation is 625 milliwatt due to which it can also be used for audio and RF signal amplification purposes.
It can be used in wide variety of electronic applications for switching and amplification purposes. It is mostly used by electronic students and hobbyists in their projects, but it is also used in commercial electronic products. Continuous Collector current (IC) is 200mAĢN3904 is a widely used general purpose transistor.
#BJT 3904 DATASHEET HOW TO#
How to Safely Long Run 2N3904 in a Circuit Playing with Transistors: NPN 2N3904 Transistor Experiment CatalogĢN3904 Environmental and Export Classifications
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