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It was originally made in the TO metal can as shown in the picture.
2222A TRANSISTOR PDF
The JEDEC registration of a device number ensures particular rated values will be met by all parts offered under that number. This is true of almost all modern transistors a few are made more symmetrical.
The value for this resistor can be calculated using the formula. Typical examples are the well known NPN and PNP industrial and military types, 2N and 2N, which have been used for over four decades and are still being used in many designs. Archived from the original on 14 April When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. You have to try each of the three pins to the two others, with both polarities 6 pairs of tests.
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. How to use 2NA This transistor like all can be used either as a switch or as an amplifier.
It is designed for low to medium currentlow powermedium voltageand can operate transistorr moderately high speeds.
Retrieved from ” https: This page was last edited on 25 Octoberat In other projects Wikimedia Commons. 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.
Commercial transistors Bipolar transistors. Most 2Ns have transidtor orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively.
A TRANSISTOR PDF
In actual circuit modifications might be required. 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.
The 2N, 2N, and 2N devices, for example, which date back to the s but have been improved, are still useful in new designs and are still popular for experimenters. But there are two important features that distinguish both. It is used in a variety of analog amplification and switching applications.
The general specifications of the various variants are similar, with the biggest difference being the maximum allowable current and power dissipation. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: Billions of units have been manufactured over the past 45 years and there is continuing high volume annual production.
The Base-Emitter voltage of this transistod is 6V so you just have to supply this voltage across the base and emitter of 2222w transistor to induce a base current into the transistor. However one important thing to notice is the Base resistor a. Wikimedia Commons has media related to 2N The 2N is an NPN transistor that can only switch one-third the current of the 2N but has otherwise similar characteristics.