DATASHEET 2222A PDF

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. To bias a transistor we have to supply current to base pin, this current IB should be limited to 5mA. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. 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. But there are two important features that distinguish both.

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I have used a base voltage of 5V and a value of 1K as current limiting resistor. 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. If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped. To confirm, you can double check with the hFE function if your meter has that. 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.

To make things simple I have shown a simplified circuit to make dwtasheet transistor as switch. When this transistor is fully biased then 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. The value for this resistor can be calculated using the formula.

Billions of units have been manufactured over the past 45 years and there is continuing high volume annual production. Zuofu 3, 2 15 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 floating dataseet, and the transistors gets pretty hot.

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. The exact specifications depend on the manufacturer, case type, and variation. Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting. It is used in a variety of analog amplification and switching applications. Hoja de especificaciones.

This is the picture of the datasheet for the pins: Wikimedia Commons has media related to 2N It is designed for low to medium currentlow powermedium voltageand can operate at moderately high speeds. How to use 2NA This transistor like all can be used either as a switch or as an amplifier. The slightly lower of the two voltages will correspond to the collector-base junctionand the other will be the emitter-base junction. ST Microelectronics Hence the 2N pin-out is sadly not standardized.

TL — Programmable Reference Voltage. You have to try each of the three pins to the two others, with both polarities 6 pairs of tests. This page was last edited on 25 Octoberat In other projects Wikimedia Commons. The JEDEC registration of a device number ensures particular rated values will be met by all parts offered under that number.

To distinguish collector from emitter, you look at the voltage shown in the diode function with the one successful test that found the base. JEDEC registered parameters include outline dimensions, small-signal current gaintransition frequencymaximum values for voltage withstand, current rating, power dissipation and temperature rating, and others, measured under standard test conditions.

What do you think? The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all. Since its initial product launch by Motorola at the IRE Convention, the 2N has become the most widely used and universally recognized transistor of all time.

In actual circuit modifications might be required. Complete Technical Details can be found at the 2NA datasheet given at the end of this page. It was originally made in the TO metal can as shown in the picture. However one important thing to notice is the Base resistor a. I am trying to figure out what is going on here.

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