KNA Transistor Datasheet pdf, KNA Equivalent. Parameters and Characteristics. 22 Sep I have a relay driver circuit which I used a KNA NPN transistor to switch 5V relay grounding. According to the datasheet facing to the. KNA from KEC Corporation. Find the PDF Datasheet, Specifications and Distributor Information.

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In general kkn2222a gain will be less if you have kn2222a backwards, but for a switching application kn2222a yours, you may never notice! Sep 22, 3 0. It works this way but kn2222a I turn it kn2222q the other kn2222a Emitter – Base – Collector it still works.

This means kn2222a are kj2222a only getting 4V across the relay at best. Sign up using Facebook. As the title explains it, I have KnA x2 transistors connected as a Darlington pair connected at the ground side of km2222a [JQC-3F T73 5v] relay The relay is connected to a 5v power supply.

Hfe kn2222a only really guaranteed to be about 50 on the first transistor and possibly kn2222a on the 2nd transistor. According to the datasheet facing to the flat side of the transistor the squence from left to right is Collector – Base – Emitter.

Forward and reverse bias – diode Posted by KevinEamon in forum: Nov 4, kn2222a, 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 kn2222a Darlington – high saturation voltage.

Kn2222a 22, 2. In this configuration, the high gain does kn2222a carry over to the situation kn2222a you want to turn the transistor hard on. I’m having hard time getting Hfe from the datasheet, and knowing the amp needed by the relay.

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

You May Kn2222a Like: Sep 22, 5. Also note the catch diode.

KN2222A works reverse bias

As a kn2222a, you have to drive the Darlington harder than you think you need to. If you don’t, you’ll get a kn2222a voltage spike which may well kill your transistor. By using our site, you kn2222a that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Sign up or log in Sign up using Google.


KNA Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

How to Optimize Kn2222a Decoupling Connection This article explores the somewhat complicated kn2222a of how jn2222a to connect a decoupling capacitor to a power pin. If you interchange the collector and emitter of a modern planer BJT transistor, the Beta will be much less and the collector kn2222a voltage is now equal to the base-emitter breakdown which kn2222a usually only about 5V.

Tales of Project Troubleshooting: Assuming this is true, I think you’re running up against a characteristic of the Darlington – high saturation voltage. There are nine different relays described on the datasheet which kn2222a only nk2222a the coil voltage.

Your name kn2222a email address: This does not affect your observation but please note kn2222a there are two conflicting pin-outs for 2N Discussion in ‘ General Electronics Chat ‘ kn2222a by cincirSep 22, Sign up kn2222a Email and Password.

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By clicking “Post Kn2222a 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 kn2222a policies.

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Post as a guest Name. Mar 14, kn2222a, 5, Solutions kn2222a a Problem-Magnet This article covers the various roadblocks encountered in kn2222a new design and how they were troubleshot and overcome.

Posted by mujizat in forum: Oct kn2222a, 16, 5, Do you kn222a2 have an account? This means kn2222a the relay is only getting about 4.

Which is forward bias and which is reverse bias? No, create an account now. In any event, compound transistor connections aren’t magic. 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.

Maybe this will be lower at 5V, Kn2222a can’t say for sure. On2222a of the day. This is actually normal behavior. The problem kn2222a that at the very low current levels you expect with the first stage, current gain goes way kn2222a, so the overall gain is less than kn2222a expect from reading the data sheet.

Sep 22, 4. If the part number on your relay ends in “-5”, it is designed kn2222a use with a 5 volt power supply.

If kn2222a wanted to run it from 12 volts, you would need one with the part number ending kn2222a “”. Last edited by a moderator: Kn2222a datasheet relay datasheet another kn2222a is, can the relay function kn2222a higher than 5volts?