KN2222 DATASHEET PDF

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You have to try each of the three pins to the two others, with both polarities 6 pairs of tests. Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting. Hence the 2N pin-out is sadly not standardized.

Korea Electronics (KEC)

This is the picture of the datasheet for the pins: Am I missing something here? 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.

Zuofu 3, 2 15 I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: I am trying to figure out what is going on here. Try not to touch the transistor while testing it because temperature will change the voltage readings. The slightly lower of the two voltages will correspond to the collector-base junctionand the other will be the emitter-base junction.

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Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively. Would you like to answer one of these unanswered questions instead? The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all.

Would I reuse it?

Home Questions Tags Users Unanswered. It can be even worse, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: To distinguish collector from emitter, you look at the voltage shown in the diode function with the one successful test that found datazheet base.

Spehro Pefhany k 4 By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Xatasheet of Service.

KN Datasheet(PDF) – KEC(Korea Electronics)

The hFE is usually much higher when properly connected than when datashert and emitter are swapped. 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. The base will show a diode connection to both other pins, in only one polarity.

What do you think?

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Korea Electronics (KEC) – datasheet pdf

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. If it is to replace a shorted transistor, we will never know if both are the same ebc configuration between your new 2N and the old 2N You can have up to 3 types of configurations.

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 floatingand the transistors gets pretty hot.

I don’t think so – throw it in the bin. This is true of almost all modern transistors a few are made more symmetrical. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:. Thank you for your interest in this question. No other pin will show that. With it wired the wrong way round the emitter is more positive than the collector and the base is datssheet biased.

Javier Loureiro 1 7 It looks like a “diode”.