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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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. Applications Can be used to switch high current upto mA loads It can also be used in the various switching applications. Absolute maximum rating daatsheet emitter-base voltage is 6V hence the E-B junction broke down and started conducting.

ST Microelectronics – datasheet pdf

The value for this resistor can be calculated using the formula. But there are two important features that distinguish both. Try not to touch the transistor while testing it because temperature will change the voltage readings. TL — Programmable Reference Voltage. You can have up to 3 types of configurations. 22222a

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This is the picture of the datasheet for the pins: As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging.


How to use 2NA This transistor like all can be used either as a switch or as an amplifier. If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped. I don’t think so – throw it in the bin. So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project.

The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. I am trying to figure out what is going on here.

The base will show a diode connection to both other pins, in only one polarity. The Base-Emitter voltage of this transistor 222a 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. The 22222a 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.

If it is to replace a shorted transistor, we will never know if both are the same ebc configuration between your new 2N and the old 2N This is true of almost all modern transistors a few are made more symmetrical. Would I reuse it? In actual circuit modifications might be required.


ST Microelectronics

It looks like a “diode”. 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. Would you like to answer one of these unanswered questions instead?

Hence the 2N pin-out is sadly not standardized. What do you think? Thank you for your interest in this question. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV. Javier Loureiro 1 7 I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:.

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

It can be even worse, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: Complete Technical Details can be found at the 2NA datasheet given at the end of this page.

Am I missing something here? To make things simple I have shown a simplified circuit to make a transistor as switch. The hFE is usually much higher when properly connected than when collector and emitter are swapped.

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