KNA Transistor Datasheet pdf, KNA Equivalent. Parameters and Characteristics. 22 Sep Hello all. I have a relay driver circuit which I used a KNA NPN transistor to switch 5V relay grounding. According to the datasheet facing to. KNA Description = General Purpose Transistor ;; Package = TO

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Last edited by a moderator: As a result, you have to drive the Darlington harder than you think you need to. KNA works reverse bias Reply to Thread.

Posted by mujizat in forum: The impurity doping concentration profile at the base-emitter junction is different from that of the base-collector junction.

Always use one of these. Oct 2, 17, 5, Home Questions Tags Users Unanswered. Hence the collector and emitter are not kn2222a. Sep 22, 3.

KNA 데이터시트(PDF) – KEC(Korea Electronics)

Sep 22, 5. Sep 22, 7. 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. Discussion in ‘ General Electronics Chat ‘ started by cincir kn2222a, Sep 22, Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts?

This means you are probably only getting 4V across the relay at best. Sign up or log in Sign up using Google. According to the datasheet facing to the flat side of the km2222a the squence from left to right is Collector – Base – Emitter.

KN2222A works reverse bias

Could anyone explain what I am doing wrong? This is actually normal behavior. This does not affect your observation but please note that there are two conflicting kn2222z for 2N A darlington transistor configuration cannot turn-on down to anything close to 0V.


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. Sep 22, 3 0. Is it just another expensive gadget, or is there possibly a deeper value to an electronic companion? Sep 22, 1.

Which is forward bias and which is reverse bias? Practical Uses of Instrumentation Amplifiers Basic refresher on instrumentation amplifiers, followed by a several real world applications in which an engineer would find this circuit. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

If you wanted to run it from 12 volts, you would need one with the part number ending in “”. Read page 2 of the data sheet. Do you already have an account?

The first transistor will saturate according to the data sheet at 0. Quote of the day. 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.

Yes, my password is: Capacitor, Reverse bias diode and resistor circuit Posted by 13th Warrior in forum: Mar 14, 19, 5, I’m having hard time getting Hfe from the datasheet, and knowing the amp needed by the relay. Also note the catch diode.


KNA NTE Equivalent NTEAP NPN audio transisto – Wholesale Electronics

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. Sep 22, 6.

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In any event, compound transistor connections aren’t magic. All this little factoids make me kn222a your expectations of the transistor, when wired as a darlington, are too high.

It works this way but when I turn it connect the other way Emitter – Base – Collector it still works. I’m assuming your circuit looks like simulate this circuit — Schematic created using CircuitLab Assuming this is true, I think you’re running up kn222a a characteristic of the Darlington – high saturation voltage.

Nov 4, 2, If you don’t, you’ll get a turn-off voltage spike which may well kill your transistor. If the part number on your relay ends in “-5”, it is designed for use with a 5 volt power supply.

Sep 22, 2. Forward and reverse bias – diode Posted by KevinEamon in forum: Sign up using Facebook. The problem is that at the very low current levels you kn2222aa with the first stage, current gain goes way down, so the overall gain is less than you expect from reading the data sheet.