![]() They can operate at a wide supply voltage ranging from 3.6V to 12V DC. The working of both circuits is simple, they are using only a few components. But some important things should be kept in mind that pin configuration must be followed because the pinout of both the transistors are different and also the collector current of both are different, therefore you should have the knowledge of how much load you are driving in your circuit to replace these transistors with each other. For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N3904. ![]() The collector current of 2N3904 is 200mA and BC547 is 100mA therefore if the load you are driving with the 2N3904 is under 100mA then you can replace it with BC547 but if the load is above 100mA then you can not use BC547 instead of 2N3904.īoth the transistors 2N3904 and BC547 are almost the same and there is little difference and hence can be used interchangeably in most cases. ![]() The one main thing to consider is the collector current difference between the two transistors. By looking at these details we can say that 2N3904 transistor can be used instead of BC547.īC547 transistor can also be used in the place of 2N3904 but there are some conditions and you must have to check these before using it instead of 2N3904. But the 300MHz is quite good (fT) value due to which both of these transistors can be used in RF circuits without any hassle. The total device dissipation of 2N3904 is 625mW and BC547 is 500mW, again it is not a big difference and it will work without any hassle. The (fT) of a transistor is considered when you are using it in a high-frequency or RF circuit. The maximum collector current of 2N3904 is 200mA while BC547 has a maximum collector current of 100mA. The Collector To Emitter voltage is an important factor to see when replacing a transistor but the difference of 10V is not a problem unless your load is under 40V. Ratings & Characteristics Comparison : Ratings & CharacteristicsĪs you can see in the above table the maximum Collector to Emitter Voltage (Vceo) of 2N3904 is 40V whereas the BC547 Vceo is 50V. The 2N3904’s first pin is Emitter, Second is Base and third is Collector while the BC547’s first pin is Collector second is Base, and third is Emitter. ![]() But when we do pin comparison then both are different according to this aspect. As shown in the image above both the transistors are manufactured in the TO-92 package which is a plastics package. NPN General Purpose Amplifier, 2N3904 Datasheet, 2N3904 circuit, 2N3904 data sheet : NSC, alldatasheet, Datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. ![]()
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