Where to 2N NPN Transistor This 2N NPN transistor has almost the same technical specifications as BC NPN transistor But the only difference between them is the continuous collector current and total power dissipation of this transistor Therefore, it could be used in that application such as switching and amplifications where BC transistor has been using. Therefore the user cannot connect the load whose current is greater than mA Similarly in the cut-off region, no current flows from emitter to collector then it acts as a turn off the switch A current limiting resistor is also in the circuit for limiting the base current because it could be damaged the transistor if the source current is greater than 5mA Configuration Modes Similarly in the amplification application, it can be connected in three configurations such as common emitter, common collector and common base. Current, voltage and power can be easily amplified by using these configuration modes. First, we will see an example of a simple LED controlling example with a switch. After that, we will see an example of controlling a dc motor with Arduino Uno.
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You can have up to 3 types of configurations. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.
Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting. Javier Loureiro 1 7 With it wired the wrong way round the emitter is more positive than the collector and the base is reverse biased.
If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped. Would you like to answer one of these unanswered questions instead? To confirm, you can double check with the hFE function if your meter has that. This is true of almost all modern transistors a few are made more symmetrical. The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all.
I am trying dayasheet figure out satasheet is going on here. It can be even kn, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: You have to try each of the three pins knn the two others, with both polarities 6 pairs of tests. Spehro Pefhany k 4 What do you think? When I apply a voltage between the pin 1 to 3, as soon as the voltage rises over about 8V, the current starts to flow, even when the base has no voltage pulled down or floatingand the transistors gets pretty hot.
To distinguish collector from emitter, you look at the voltage shown kn the diode function with the one successful test that found the base. I have a simple circuit to send current to a brushless fan running at kn on the high side, using a NPN transistor 2NA: Try not to touch the transistor while testing it because temperature will change the voltage readings.
Am I missing something here? Zuofu 3, 2 15 Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively. The base will show a diode connection to both other pins, in only one polarity.
KN2222 Datasheet, Equivalent, Cross Reference Search
It is used in a variety of analog amplification and switching applications. PNA and other "Plastic" versions[ edit ] Replacements for the 2N are commonly available now in the cheaper TO packaging, where it is known as the PN or P2N, which has similar specifications except for the lower maximum collector current. Surface-mount versions[ edit ] Single transistors are also available in several different surface mount packages, and a number of manufacturers market surface mount packages that incorporate several 2Ntype transistors in one package as an array of transistors. The general specifications of the various variants are similar, with the biggest difference being the maximum allowable current and power dissipation. Similar types[ edit ] The BC family, including the BCA to BCC, are lower voltage, lower current, general-purpose transistors in TO packages, originating in Europe, that are often found in small-signal amplification and switching circuits of the type where the 2N might otherwise be used. They are not true replacements, but comparable devices that may be substituted only in circuits where the maximum current and voltage ratings are not exceeded. The 2N exhibits its forward gain beta peak at a lower current than the 2N, and is useful in amplifier applications with reduced Ic, e.
2N2222 NPN Transistor