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KN2222A PDF

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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Post as a guest Name. Sign up using Facebook. Sep 22, 5. If you don’t, you’ll get a turn-off voltage spike which may well kill your transistor. I’m having hard time getting Hfe from kn2222z datasheet, and kn2222a the amp needed by the relay.

Is it just another expensive gadget, or is there possibly a deeper value to an electronic companion? In any event, compound transistor connections aren’t magic. A darlington transistor configuration cannot turn-on down to anything close to 0V. Also note the catch diode.

KNA 데이터시트(PDF) – KEC(Korea Electronics)

Hence the collector and emitter are not interchangeable. Quote of the day. You May Also Like: Mar 14, 19, 5, Sep 22, 8. Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts? No, create an account now. According to the datasheet facing to the flat side of the transistor the squence from left kn2222s right is Collector kn222a Base – Emitter.

By using our site, you acknowledge that you have kn2222w and understand our Cookie PolicyPrivacy Policyand our Terms of Service. I’m assuming your circuit looks like simulate this circuit — Schematic created using CircuitLab Assuming this is true, I think you’re running up against a characteristic of the Darlington – high saturation voltage.

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.

Capacitor, Reverse bias diode and resistor circuit Posted by 13th Warrior in forum: The problem is that at the very low current levels you expect with kn222a first stage, current gain goes way down, so the overall kn222a is less than you expect from reading the data sheet. Sign up or log in Sign up using Google. Always use one of these. Do you already have an account?

When I check both datasheets their characteristics are not kn222a same but smilar and according to the measurements all the Voltage and Current values are in range. Discussion in ‘ General Electronics Chat ‘ started by cincirSep 22, The impurity doping concentration profile at the base-emitter junction is different from that of the base-collector junction. The first transistor will saturate according to the data sheet at 0.

KN2222A Datasheet, Equivalent, Cross Reference Search

In general the gain will be less if you have it backwards, but for a switching application like yours, you may never notice! KNA works reverse bias Reply to Thread. I am a little confused. Sep 22, 2. It works this way but when I in2222a it connect the other way Emitter – Base – Collector it still works.

Read page 2 of the data sheet. If you wanted to run it from 12 volts, you would need one with the part number ending in “”. Nov 4, 2, Sep 22, 6. Maybe this will be lower at 5V, I can’t say for sure. But these are at voltages of 10V. Andy aka k 10 Posted by mujizat in forum: Sign up using Email and Password.

This does not affect your observation but please note that there are two conflicting pin-outs for 2N Sep 22, 3. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyln2222a that your continued use of the website is subject to these policies.

Forward and reverse bias – diode Posted by KevinEamon in forum: Sep 22, 1. 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.