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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Korea Electronics (KEC)

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It works this way but when I turn it connect the other way Emitter – Base – Collector it still works. Sign up using Email and Password. This means you are probably only getting 4V across the relay at best. Apr 5, 5.

Sign up or log in Sign up using Google. Which is forward bias and which is reverse bias?


KN2222A Datasheet PDF

I suppose that you have made certain of your wiring? Hfe is only really guaranteed to be about 50 on the first transistor and possibly about on the 2nd transistor.

My first hypothesis is that the arduino doesn’t provide enouth current to saturate the power transistor. Apr 16, 3, 1, The Value of Customization: Also, I saw somewhere a cap in parallel with the diode, is that a good idea?

If you don’t, you’ll get a turn-off voltage spike which may well kill your transistor. This does not affect your observation but please note that there are two conflicting pin-outs for 2N Seems like it should work fine with a single transistor. I’m going to put 8 diodes around the two H bridges thanks for the head up.

KNA Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

I am a little confused. Thank you for all the replies. Read page 2 of the data sheet.

Oct 2, 17, 5, I suspect that your KNA is bad or low gain. A darlington transistor configuration cannot turn-on down to anything close to 0V. To control the servo I build a H bridge circuit that is working fine.


KNA works transstor bias Reply to Thread. 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. Email Required, but never shown. Feb 23, 3 0.

Sep 23, 9. Apr 5, 1.

Apr 5, 2. In any event, compound transistor connections aren’t magic. Apr 5, 4.


Capacitor, Reverse bias diode and resistor circuit Posted by 13th Warrior in forum: As a result, you have to drive the Darlington harder than you think you need to. Switching a 12vdc motor with a transistor Posted by Rich2 in forum: Sep 22, 7. Dec 29, 1, Hence the collector and emitter are not interchangeable.