August 11, 2019 posted by

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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KN Datasheet, PDF – Alldatasheet

Hence the 2N pin-out is sadly not standardized. Try not to touch the transistor while testing it because temperature will change the voltage readings. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms datwsheet Service.

To distinguish collector from emitter, you look at the voltage shown in the diode function with the one successful test that found the base. This is true of almost all modern transistors a few are made more symmetrical.

To confirm, you can double check with the hFE kn2222 if your meter has that. Would you like to answer one of these unanswered questions instead? The slightly lower of the two voltages will correspond to the collector-base junctionand the other will be the emitter-base junction. This is the picture of the datasheet for the pins: I am trying to datasheeet out what is going on here.


No other pin will show that. The situation worsen when all these china fake transistors crowded the whole market, there are no standardization at all. If I set up the circuit for a quick test, it seems that the datasheet or the transistor has the pins swapped.

(PDF) KN2222 Datasheet download

I don’t think so – throw it in the bin. 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. 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 on this site the association bonus does not count.

Absolute maximum rating for emitter-base voltage is 6V hence the E-B junction broke down and started conducting.

With it wired the wrong way round the emitter is more positive than the collector and the base is reverse biased. It looks like a “diode”. Zuofu 3, 2 15 Am I missing something here? I have a simple circuit to send current to a brushless fan running at 12V on the high side, datasjeet a NPN transistor dtaasheet.


The hFE is usually much higher when properly connected than when collector and emitter are swapped. Spehro Pefhany k 4 Home Questions Tags Users Unanswered.

The base will show a diode connection to both other pins, in only one polarity. You can have up to 3 types of configurations.

What do you think? Thank you kh2222 your interest in this question. This is the pic of the transistor, as I understand that it should work, but it in2222 it is always ‘on’ with 12V between the collector and the emitter with the base floating. Javier Loureiro 1 7 Most 2Ns have the orientation which your diagram shows, where if the flat side is facing you, the pins are E-B-C respectively.

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 I have a simple circuit to send current to a brushless fan running at 12V on the high side, using a NPN transistor 2NA: You have to try each of the datasheft pins to the two others, with both polarities 6 pairs of tests.