![]() Yes, you can use 2N3904 instead of BC548 and there are also other transistors which you can use instead of BC548 such as BC547, BC549 etc. So finally both the transistors are different type of transistors one is NPN and another is PNP and cannot be replaced directly in a circuit and the user must have some knowledge of electronic circuits if he/she wants to interchange them. ![]() For further details about what are the difference between NPN and PNP transistor check our page here: NPN VS PNP Transistor. Ratings & CharacteristicsĪs you can see at the ratings and characteristics chart above both the transistors have same ratings but the 2N3904 has positive ratings and 2N3906 has negative this difference is because (as mentioned before) both are different type of transistors one is NPN and another is PNP. But for doing this one must have some knowledge about how to design a circuit or how the transistors work in electronic circuits. The 2N3904 is an NPN transistor and 2N3906 is a PNP, this is a major difference between these two transistors so we cannot replace them directly but it is possible to use the one in the place of other and in most situations it also works. As discussed the 2n3906 is a PNP transistor so it requires negative voltage at its base to pass current between its collector and emitter and to set it on full saturation mode or fully ON we have to provide atleast 0.6V at its base with 15mA to 20mA. It is also a small signal transistor that is used widely in commercial, industrial and educational circuits. ![]() Same as the pin configuration is also same such as the first pin is “Emitter” second is “Base” and the third is “Collector”. Like 2N3904 this transistor is also available in TO-92, SOT-23 and SOT223 packages. And to make it fully saturated or fully switch ON we have to provide atleast 0.6V at its base with 15mA to 20mA.ĢN3906 is also a very popular PNP transistor which is also designed for general purpose switching, amplification and other general applications and its NPN complementary transistor is 2N3904. As it is an NPN transistor so it requires positive input at its base to pass current between its collector and emitter. Additionally it is also used in many educational electronic projects too. It is a small signal transistor used in variety of commercial and industrial applications. Looking at the pin configuration of the transistor the first pin of the transistor is “Emitter” second is “Base” and third is “Collector”. ![]() The transistor is available in TO-92, SOT-23 and SOT-223 packages. Its PNP complementary transistor is 2N3906. 2N3904 is a very popular NPN BJT transistor designed to use in general purpose switching, amplification and other general applications. ![]()
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