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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Hence 22222a 2N pin-out is sadly not standardized. You can have up to 3 types of configurations. Javier Loureiro 1 7 The base will show a diode connection to both other pins, in only one polarity. The hFE is usually much higher when properly connected than when collector and emitter are swapped.

Would I reuse it? If it is to replace a shorted transistor, we will never know if both are the same ebc datadheet between your new 2N and the old 2N How to use 2NA This transistor like all can be used either as a switch or as an amplifier. This transistor like all can be used either as a switch or as an amplifier.

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Applications Can be used to switch high current upto mA loads It can also be used in the various switching applications. This is true of almost all modern transistors a few are made more symmetrical.

What do you think? Zuofu 3, 2 15 I am trying to figure out what is going on here. This is the pic of the transistor, as I understand that it should work, but it doesn’t it is always ‘on’ with dayasheet between the collector and the emitter with the base floating.

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

Spehro Pefhany k datasheeet When base current is removed the datsaheet becomes fully off, this stage is called as the Cut-off 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. No other pin will show that. You have to try each of the three pins to the two others, with both polarities 6 pairs of tests.


To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA. Thank you for your interest in this question.

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. 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.

As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging. But there are two important features that distinguish both. Am I missing something datsheet

ST Microelectronics – datasheet pdf

When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. 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.

I don’t think so – throw it in the bin. To confirm, you can double check with the hFE function if your meter has that. Would you like to answer one of these unanswered questions instead?

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 have a simple circuit 2222a send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: However one important thing to notice is the Base resistor a.


I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:. The Base-Emitter voltage of this transistor is 6V so you dayasheet have to supply this voltage across the base and emitter of the transistor to induce a base current into the transistor. Try not to touch the transistor while testing it because temperature will dtaasheet the voltage readings.

TL — Programmable Reference Voltage. So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project. Complete Technical Details can be found at the 2NA datasheet given at the end of this page.

This is the picture of the datasheet for the pins: This transistor will make it forward biased and thus closes the connection between collector and emitter. In actual circuit modifications might be required.

ST Microelectronics

Because 2222q 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. To make things simple I have shown a simplified circuit to make a transistor as switch. If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped.