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Typical examples are the well known NPN and PNP industrial and military types, 2N and 2N, which have been used for over four transistog and are still being used in many designs.
This is the picture transisfor the datasheet for the pins: How transistof use 2NA This transistor like all can be used either as a switch or as an amplifier. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: The 2N is considered a very common transistor,    and is used as an exemplar of an NPN transistor.
This transistor like all can be used either as a switch or as an amplifier. Home Questions Tags Users Unanswered. All variations have a beta or current gain h fe of at least in optimal conditions. 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.
Replacements for the 2N are commonly available now in the cheaper TO packaging, where it is known as the PN or P2N, which transisfor similar specifications except for the lower maximum collector current.
A TRANSISTOR PDF
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. High frequency and microwave engineering. However one important thing to notice is the Base resistor a. This page was last edited on 25 Octoberat It is used in a variety of analog amplification and switching applications.
Use dmy dates from July Commons category link is on Wikidata. High frequency and microwave engineering. I have a simple circuit to send current transisfor a brushless fan running at 12V on the high side, using a NPN transistor 2NA:.
2222A TRANSISTOR PDF
Spehro Pefhany k 4 No transisgor pin will show that. This is true of almost all modern 222a a few are made more symmetrical.
Wikimedia Commons has media related to 2N To make things simple I have shown a simplified circuit to make a transistor as switch. As the name suggests this resistor will limit the current flowing through the transistor to prevent it from damaging. Find it and more at Jameco Electronics. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. I have used a base voltage of 5V and a transisttor of 1K as current limiting resistor.
To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA. 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. So if you looking for an NPN transistor that could switch loads of higher current then 2NA might the right choice for your project.
All variations have a beta or current gain h fe of at least in optimal conditions. Archived from the original on 14 April The 2N exhibits its forward gain beta peak at a lower current than the 2N, and is useful in amplifier applications with reduced I ce. JEDEC registered parameters include outline trnasistor, small-signal current gaintransition frequencytransistir values for voltage withstand, current rating, power dissipation and temperature rating, and others, measured under standard test conditions.
2NA Pinout, Features, Equivalent & Datasheet
The general specifications of the various variants are similar, with the biggest difference being the maximum allowable current and power dissipation. But there are two important features that distinguish both. It is used in a variety of analog amplification and switching applications.
The JEDEC registration of a device number ensures particular rated values trahsistor be met by all parts offered under that number.
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. Applications Can be used to switch high current upto mA loads It can also be used in the various switching applications.
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, transostor when the base has no voltage pulled down or floatingand the transistors gets pretty hot.
Other part numbers will have different parameters. The 2N is an NPN transistor that can only switch one-third the current of the 2N but has otherwise similar characteristics.
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The exact specifications depend on the manufacturer, case type, and variation.