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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Submitted by webmaster on 11 December Zuofu 3, 2 15 You have to try each of the three pins to the two others, with both polarities 6 pairs of tests.

This transistor like all can be used either as a switch or as an amplifier. To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA. When this transistor is fully biased datqsheet it can allow a maximum of mA to flow across the collector and emitter.

Note that the motor here draws about mA from the 12V power source, since the 2N has collector current rating upto mA this circuit is possible had it been a BC the transistor should have been burnt. If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped. datashedt

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

Complete Technical Details can be found at datashedt 2NA datasheet given at the end of this page. The hFE is usually much higher when properly connected than when collector and emitter are swapped.

It can be even worse, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: Would you like to answer one of these unanswered questions instead?

When base current is removed the transistor becomes fully off, this stage is called as the Dagasheet Region and the Base Emitter voltage could be around mV. I have used a base voltage of 5V and a value of 1K as current limiting resistor. It looks like a “diode”. This is the picture of the datasheet for the pins: Would I reuse it? Am I missing something here?


So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project.

No other pin will show that. Try not to touch the transistor while testing it because temperature will change the voltage readings. However one important thing to notice is the Base resistor a. 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.

Hence the 2N pin-out is sadly not standardized. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor.

ST Microelectronics – datasheet pdf

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms datasheef Service. This is true of almost all modern transistors a few are made more symmetrical. Thank you for your interest in this question. Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively. I don’t think so – throw it in the bin. How to use 2NA This transistor like all can be used either as a switch or as an amplifier.

This transistor will make it forward biased and thus closes the connection between collector and emitter.

The slightly lower of the two voltages will correspond to the collector-base junctionand the other will be the emitter-base junction. The value for this resistor can be calculated datashset the formula. With it datashwet the wrong way round the emitter is more positive than the collector and the base is reverse biased. Spehro Pefhany k 4 The base will show a diode connection to both other pins, in only one polarity.


ST Microelectronics

To make things simple I have shown a simplified circuit to make a transistor as switch. If it is to replace a shorted transistor, we will never know if both are the same ebc configuration between your new 22222a and the old 2N Javier Loureiro 1 7 TL — Programmable Reference Voltage. 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.

As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging. Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting.

Home Questions Tags Users Unanswered. 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 dataaheet base has no voltage pulled down or floatingand the transistors gets pretty hot.

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You can have up to 3 types of configurations. To distinguish collector from emitter, you look at the voltage shown in the diode function with the one successful test that found the base.

What do you think? The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:.

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.

I am trying to figure out what is going on here. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: