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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ST Microelectronics – datasheet pdf

Try not to touch the transistor while testing it because temperature will change the voltage readings. If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped. So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project.

This transistor like all can be used either as a switch or as an amplifier. Am I missing something here? When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter.

datashet The hFE is usually much higher when properly connected than when collector and emitter are swapped. 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 using the formula.

When I apply a voltage between the pin datasheeg 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. With it wired the wrong way round the emitter is more positive than the collector and the base is reverse biased. TL satasheet Programmable Reference Voltage. What do you think? 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.


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

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.

It can be even worse, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: 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.

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.

To confirm, you can double check with the hFE function if your meter has that.

ST Microelectronics

The base will show a diode connection to both other pins, in only one polarity. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

This is true of almost all modern transistors datasbeet few are made more symmetrical. But there are two important features that distinguish both. Home Questions Tags Users Unanswered.


To distinguish collector from emitter, you look at the voltage shown in the diode function with the one successful datqsheet that found the base. No other pin will show that. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:.

2NA Pinout, Features, Equivalent & Datasheet

I am trying to figure out what is going on here. In actual circuit modifications might be required. Thank you for your interest in vatasheet question. It looks like a “diode”.

Would I reuse it? Hence the 2N pin-out is sadly not standardized. This transistor will make it forward biased and thus closes the connection between collector and emitter. I don’t think so – throw it in the bin. When base current is removed dayasheet transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV.

To make things simple I have shown a simplified 2222x to make a transistor as switch. Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively.

Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting. This is the picture of the datasheet for the pins: You can have up to 3 types of configurations.