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 -.

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. If the part number on your relay ends in “-5”, it is designed for use with a 5 volt power supply. Sep 22, 3 0. I kn222a just speculating the base current might be pulling down your voltage source you could measure the base voltage to check for that.

If you interchange the collector and emitter of a modern planer BJT transistor, the Beta will be much less and the collector transostor voltage is now equal to the base-emitter breakdown which is usually only about 5V. You May Also Like: Hfe is only really guaranteed to be about 50 on the first transistor and possibly about on the 2nd transistor.

Connecting transisttor gate at 12V immediately runs the motor, so transistor piout discarded. Create a no-fly zone!

According to the datasheet facing to the flat side of the transistor kh2222a squence from left to right is Collector – Base – Emitter.

Problem with transistor and a motor

Sep 22, 3. I checked so many times the wiring I’m going to put 8 diodes around the two H bridges thanks for the head up. No, create an account now. Also, I saw somewhere a cap in parallel with the diode, is that a good idea?


WhatRoughBeast 49k 2 28 Apr 6, 6. Digital Tattoos Bend The Limits Digital tattoos are an interesting implementation of an new category of “flexible electronics.

Posted by mujizat in forum: The impurity doping concentration profile at transistoe base-emitter junction is different from that of the base-collector junction. Hence the collector and emitter are not interchangeable.

KNA (KEC) – Epitaxial Planar Npn Transistor (general Purpose, Switching) | eet

But, before that I bought some TIP darlington in a local store to replace the C, and it worked perfectly. Nov 4, 2, Oct 2, 17, 5, Email Required, but never shown. There are nine different relays described on the datasheet which differ only in the coil voltage. Discussion in ‘ General Electronics Chat ‘ started by cincirSep 22, Do you already have an account?

Sep 22, 4. Yes, my password is: My problem is related with my inability to fully saturate the power transistor i recycled from the trasnistor board, it’s a NPN transistor 2SC So, using the 30 ohms resistors, patricktoday suggested, works like charm. Could anyone explain what I am doing wrong?

If you don’t, you’ll get a turn-off voltage spike which may well kill your transistor. But these are at voltages of 10V. Post as a guest Name. My first hypothesis is that the transisror doesn’t provide enouth current to saturate the kn22222a transistor.


The coil voltage is given in the last digit or two of the part number, and may be 3, 5, 6, 9, 12, 18, 24, 36, or 48 volts. Problem with transistor and a motor Reply to Thread. A kn2222w transistor configuration cannot turn-on down to anything close to 0V.

Which is forward bias and which is reverse bias?

Maybe my cheap multimeter was messing around, maybe the USB wasn’t giving the 0. And then the C was working also fine.

You May Also Like: No, create an account now. I dont have 2sc so I used 2sc which is about half the spec of your transistor.

Do you already have an account? Sep 22, 2. In this configuration, the high gain does not carry over to the situation where you want to turn the transistor hard on. The first transistor will saturate according to the data sheet at 0. I’m having hard time getting Hfe from the datasheet, and knowing the amp needed by the relay.

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Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts? Sep 22, 1. I am a little confused.

Thank you for all the replies. Sep 22, 8.