Datasheet contains the design specifications for product development. Datasheet contains preliminary data; supplementary data will be. Symbol. Parameter. Value. Unit. VCBO. Collector-Emitter Voltage (IE = 0). V. VCEO. Collector-Emitter Voltage (IB = 0). V. VEBO. Emitter-Base Voltage (IC. SMBT A. 1. Oct NPN Silicon Switching Transistor. • High DC current gain: mA to mA. • Low collector-emitter saturation voltage.

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I am trying to figure out what is going on here.

2NA Pinout, Features, Equivalent & Datasheet

datasheeet Complete Technical Details can be found at the 2NA datasheet given at the end of this page. 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.

I don’t think so – throw it in the bin. I have a simple 2222 to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:. Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting. This is the pic of the transistor, as I understand that it should work, but it doesn’t it is always ‘on’ with 12V between the collector and the emitter with the base floating.

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To make things simple I have shown a simplified circuit to make a transistor as switch. Spehro Pefhany k 4 To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA.

Would you like to answer one of these unanswered questions instead? The Base-Emitter voltage of this transistor is 6V so you just have to supply this voltage across the base and emitter of the transistor to induce a base current into the transistor.

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PN2222A . Datasheet. Equivalente. Reemplazo. Hoja de especificaciones. Principales características

In actual circuit modifications might be required. To confirm, you can double check with the hFE function if your meter has that.

With it wired the wrong way round the emitter is more positive than the collector and the base is reverse biased. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The hFE is usually much higher when properly connected than when collector and emitter are swapped. It looks like a “diode”.

You have to try each of the three pins to the two others, with both polarities 6 pairs of tests. Applications Can be used to switch high current upto mA loads It can also be used in the various switching applications.

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The value for this resistor can be calculated using the formula. What dataheet you think? Javier Loureiro 1 7 TL — Programmable Reference Voltage. No other pin will show that. The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all.


When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively.

This is true of almost all modern transistors a few are made more symmetrical.

So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project. As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging.

This dataseet like all can be used either as a switch or as an amplifier. However one important thing to notice is the Base resistor a. Datahseet distinguish collector from emitter, you look at the voltage shown in the diode function with the one successful test that found the base. I have used a base voltage of 5V and a value of 1K as current limiting resistor.