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KN Description = General Purpose Transistor ;; Package = TO Details, datasheet, quote on part number: KN KN datasheet, KN circuit, KN data sheet: KEC – EPITAXIAL PLANAR NPN TRANSISTOR,alldatasheet, datasheet, Datasheet search site for . KN Datasheet, KN PDF, KN Data sheet, KN manual, KN pdf, KN, datenblatt, Electronics KN, alldatasheet, free, datasheet.

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Spehro Pefhany k 4 With it wired the wrong way round the emitter is more positive than the collector and the base is reverse biased.

KN Datasheet, PDF – Alldatasheet

I am trying to figure out what is going on here. It can be even worse, since the On Semi PN has the conventional pinout, despite being the same manufacturer and mostly same specifications: Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation datasheft this site the association bonus does not count.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Absolute maximum rating for emitter-base voltage is kn222 hence the E-B junction broke down and started conducting.

KN2222 Datasheet PDF

It looks like a “diode”. Most 2Ns have the orientation which fatasheet diagram shows, where if the flat side is facing you, the pins are E-B-C respectively. 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. To confirm, you can double check with the hFE function if your meter dtaasheet that.


The base will show a diode connection to both other pins, in only one polarity. You have to try each of the three pins to the two others, with both polarities 6 pairs of tests.

Hence the 2N pin-out is sadly not standardized. I don’t think so – throw it in the bin. What do you think? Would I reuse it? This is the picture of the datasheet for the pins: Try not to touch the transistor while testing it because temperature will change the voltage readings. Am I missing something here?

Datasheet «KN2222»

Javier Loureiro 1 7 on2222 The slightly lower of the two voltages will correspond to the collector-base junctionand the other will be the emitter-base junction. Zuofu 3, 2 15 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 The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all.


Thank you for your interest in this question. I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA:.

If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped.

I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: Would you like to answer one of these unanswered questions instead? No other pin will show that.

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. To distinguish collector from emitter, you look at the voltage shown in datasheeet diode function with the one successful test that found the base.

Home Questions Tags Users Unanswered. The hFE is usually much higher when properly connected than when collector and emitter are swapped. This is true of almost kn2222 modern transistors a few are made more symmetrical. You can have up to 3 types of configurations.