TECHNICAL DATA. KN/A. EPITAXIAL PLANAR NPN TRANSISTOR. Revision No: 0. GENERAL PURPOSE APPLICATION. SWITCHING APPLICATION. KNA Description = General Purpose Transistor ;; Package = TO Part Category: Transistors Manufacturer: KEC Corporation Description: Small Signal Bipolar Transistor, A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, TO -.

Author: Tujora Kigalkis
Country: Burma
Language: English (Spanish)
Genre: Video
Published (Last): 28 June 2015
Pages: 410
PDF File Size: 10.51 Mb
ePub File Size: 5.29 Mb
ISBN: 459-5-97501-479-1
Downloads: 87282
Price: Free* [*Free Regsitration Required]
Uploader: Morn

Sep 22, 3 0. Mar 14, 20, 5, As the title explains it, I have KnA x2 transistors connected as a Darlington pair connected at the ground side of a [JQC-3F T73 5v] relay The relay is connected to a 5v power supply. The impurity doping concentration profile at the base-emitter junction is different from that of the base-collector junction.

Dec 29, 1, Discussion in ‘ General Electronics Chat ‘ started by cincirSep 22, If you interchange the collector and emitter of a modern planer BJT transistor, the Beta will be much less and the collector breakdown voltage is now equal to the base-emitter breakdown which is usually only about 5V.

Sep 23, 9.

Hfe is only really guaranteed to be about 50 on the first transistor and possibly about on the 2nd transistor. The Value of Customization: Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts?

If you don’t, you’ll get a turn-off voltage spike which may well kill your transistor. The circuit below is the last attempt to make this work with the two transistors.


Apr 5, 4. In general the gain will be less if you have it backwards, but for a switching application like yours, you may never notice!

Sep 22, 5. Home Questions Tags Users Unanswered.

KN2222A works reverse bias

There are nine different relays described on the datasheet which differ only in the coil voltage. Capacitor, Reverse bias diode and resistor circuit Posted by 13th Warrior in forum: Assuming this is true, I think you’re running up against a characteristic of the Darlington – high saturation voltage.

The Pixel 2 is on its way, but consumers are still struggling to get their hands on Pixel 1’s. Sign up using Facebook.

This means that the relay is only getting about 4. Connecting the gate at 12V immediately runs the motor, so transistor piout discarded.

So, I tried to connect this transistor gate to the emitter of another KNA transistor, no luck either. Maybe this will be lower at 5V, I can’t say for sure. Your name or email address: Apr 5, 3. Do you already have an account? If the part number on your relay ends in “-5”, it is designed for use with a 5 volt power supply. Hi I tried what you said and it worked.

Sep 22, 6. I checked so many times the wiring The first transistor will saturate according to the data sheet at 0. Yes, my password is: Shouldn’t there be a resistor between the arduino pin and the transistor base?

Apr 5, 1. The motor uses 0. No, create an account now. Sep 22, 2. I suspect that your KNA is bad or low gain. Which is forward bias and which is reverse bias?


KNA (KEC) – General Purpose Transistor, Package = TO | eet

Anyway, now, connecting the 5V from the Arduino to the base tarnsistor just testing fully saturates the power transistor, but doing so shutdown the board in less than a second.

In any event, compound transistor connections aren’t magic. Could anyone explain what I am doing wrong? I’m going to put 8 diodes around the two H bridges thanks for the head up.

KNA works reverse bias | All About Circuits

You May Also Like: And then the C was working also fine. Quote of the day. Last edited by a moderator: The problem is that at the very low current levels you expect with the first stage, current gain goes way down, so the overall gain is less than you expect from reading the data transistog. If you wanted to run it from 12 volts, you would need one with the part number ending in “”.

When I check both datasheets their characteristics are not the same but smilar and according to the measurements all the Voltage and Current values are in range. Discussion in ‘ The Projects Kn2222s ‘ started by terrikApr 5, I dont have 2sc so I used 2sc which is about half the spec of your transistor.