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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Read page 2 of the data sheet. Is it just another expensive gadget, or is there possibly a deeper value to an electronic companion? Last edited by a moderator: 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.
The first transistor will saturate according to the data sheet at 0. In general the gain will be less if you have it backwards, but for a switching application kn22222a yours, you may never notice! Also note the kn22222a diode. Hence the collector and emitter are not interchangeable.
According to the datasheet facing to the flat side of the transistor the squence from left to right is Collector – Base – Emitter. The problem is that at the very low current levels you expect with the first stage, current gain goes way down, so the overall gain is less than you expect from reading the data sheet.
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.
Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts? Quote of the day. Your name or email address: Oct 2, 17, 5, Hfe is only really guaranteed to be about 50 on the first transistor and possibly about on the 2nd transistor.
Sep 22, 3 0. But these are at voltages of 10V.
KNA works reverse bias Reply to Thread. Posted by mujizat in forum: Yes, my password is: Mar 14, 19, 5, This does not affect your observation but please note that there are two conflicting pin-outs for 2N If the part number on your relay ends in “-5”, it is designed for use with a 5 volt power supply.
All this little factoids make me think your expectations of the transistor, when wired as a darlington, are too high. I’m having hard time getting Hfe from the datasheet, and knowing the amp needed by the relay.
Post as a guest Name. This means you are probably only getting 4V across the relay at best. Sep 22, 1.
Nov 4, 2, Always use one of these. This article looks at some of the robotic and virtual companions available on the market.
Andy aka k 10