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. Datasheet contains the design specifications for product development. Datasheet contains preliminary data; supplementary data will be.

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

Junkbots, bugbots, and bots on wheels: The general specifications of the various variants are similar, with the biggest difference being the maximum allowable current and power dissipation.

Commercial transistors Bipolar transistors.

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.


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

Archived from the original on 14 April TL — Programmable Reference Voltage. The BC is a low voltage, low current, general-purpose switching transistor in a TO package. They’re listed together because they’re complementary transistors. Hence the 2N pin-out is sadly not standardized.

ST Microelectronics – datasheet pdf

Home Questions Tags Users Unanswered. Graf and William Sheets When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter.

All variations have a beta or current gain h fe of at least in optimal conditions.

The JEDEC registration of a device number ensures particular rated values will be met by all parts offered under that number. Datashfet 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.

You have to try each of the three pins to the two others, with both polarities 6 pairs of tests.

ST Microelectronics

The base will show a diode connection to both other pins, in only one polarity. Spehro Pefhany k 4 The exact specifications depend on the manufacturer, case type, and variation. Am I missing something here?

Submitted by webmaster on 11 December Views Read Edit View history. 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.


Build your own low-power transmitters: The value for this resistor can be calculated using the formula. I am trying to figure out what is going on here.

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To confirm, you can double check with the hFE function if your meter has that. Zuofu 3, 2 15 I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:. 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. The slightly lower of the two voltages will correspond to the collector-base junctionand the other will be the emitter-base junction.


How to use 2NA This transistor like all can be used either as a switch or as an amplifier. Other part numbers will have different parameters. If it is to replace a shorted transistor, we will never know if both are 222a same ebc configuration between your new 2N and the old 2N