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2N2222A –NPN Transistor

Therefore, it is important to refer to the datasheet for the exact part number and manufacturer. Trivial questions that trandistor require reading the datasheets should be closed.

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.

Retrieved from ” https: Mathematical formula of the minimum separations required between two patch antennas? I bet is this one: From Wikipedia, the free encyclopedia. By using this site, you agree to the Terms of Use and Privacy Policy. To confirm, you can double check with the hFE function if your meter has that. Voltage Comparator Design Here its collector current is probably a lot more than only 38mA.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. What do you think? Views Read Edit View history. Initial value depending on the input 8.


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. Am 2222x missing something here? Fuse Amperage Determination Circuit trajsistor Other part numbers will have different parameters. Dual-channel DMM puts two 7. Maximum power point in solar converter Would you like to answer one of these unanswered questions instead? However one important thing to notice is the Base resistor a.

Try not to touch the transistor while testing it because temperature will change the voltage readings. It makes the base current only 9V – 0. The time now is It is used in a variety of analog amplification and switching applications. The A is an old-generation switching transistor, starting life as a metal can TO transistor in the s. Graf and William Sheets Billions of transiator have been manufactured over the past 45 years and there is continuing high volume annual production. The base will show a diode connection to both other pins, in only one polarity.

So your application defines your selection in such cases. It is designed for low to medium transjstorlow powermedium voltageand can operate at moderately high speeds. The basic difference is the 2NA is explicitly labeled “switching mode transistor”, which explains the much higher collector current in the same casing.

Top menu About Us Advertise. It looks like a “diode”. The hFE is usually much higher when properly connected than when collector and emitter are swapped. The BC is a low voltage, rtansistor current, general-purpose switching transistor in a TO package. It was originally made in the TO metal can as shown in the picture.


It’s one of those products that proved to be suitable for a variety of transitor and continues to be widely available, especially as the TO plastic version. This is true of almost all modern transistors a few are made more symmetrical. Complete Technical Details can be found at the 2NA datasheet given at the end of this page.

2N A/ A — Transistors | Manufacturer | Continental Device India Ltd (CDIL)

It has higher current and voltage ratings and lower saturation voltage than the other types you mentioned. With a 9V battery then a series base resistor value of 22k is much too high. No other pin will show that.

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