PN2222A DATASHEET PDF

It is used in a variety of analog amplification and switching applications. PNA and other "Plastic" versions[ edit ] Replacements for the 2N are commonly available now in the cheaper TO packaging, where it is known as the PN or P2N, which has similar specifications except for the lower maximum collector current. Surface-mount versions[ edit ] Single transistors are also available in several different surface mount packages, and a number of manufacturers market surface mount packages that incorporate several 2Ntype transistors in one package as an array of transistors. The general specifications of the various variants are similar, with the biggest difference being the maximum allowable current and power dissipation. Similar types[ edit ] The BC family, including the BCA to BCC, are lower voltage, lower current, general-purpose transistors in TO packages, originating in Europe, that are often found in small-signal amplification and switching circuits of the type where the 2N might otherwise be used. They are not true replacements, but comparable devices that may be substituted only in circuits where the maximum current and voltage ratings are not exceeded.

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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. So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project. How to use 2NA This transistor like all can be used either as a switch or as an amplifier. The 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. This transistor will make it forward biased and thus closes the connection between collector and emitter.

However one important thing to notice is the Base resistor a. As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging.

In actual circuit modifications might be required. I have used a base voltage of 5V and a value of 1K as current limiting resistor. 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. Can be used to switch high current upto mA loads It can also be used in the various switching applications.

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