Hi New to this and looking for Library Symbols for Exicon devices, Specifically ECX10N20 and ECX10P20. Alternatively (and if pos) ECX20N20 & ECX20P20.
Theyâre MOSFETs. So just use a MOSFET symbol. Nothing special about that.
Really? So what happens when the cct is used to produce a PCB? Also why if thatâs the case do they have different transistors rather than a single generic entry (Transistor)?
In a sense there are only a few generic transistors, but there are permutations. There are N and P polarity devices, then there are 6 permutations for the pin numbering. And of course there are BJTs and FETs. The latter can be JFET or MOSFET. You can find all these permutations in the Device library.
But if youâre thinking about package and size, those are footprint concerns not schematic concerns. And if you are thinking about electrical characteristics that is a simulation concern.
So why are there symbols for specific models? Those are the ones when the particular type has been preselected and often the package (footprint) has been associated also.
If you are unclear on the separation between symbols and footprints, you might want to read the documents at https://docs.kicad.org
Thanks retiredâŚ
With the lack of ability on my part to produce a simple Symbol and tie it to Physical Package and Spice model it looks like no advantage using a âPackageâ like this for producing Audio PCBâs from circuit design.
I will return to drawing by Visio (the original Visio not the ba$tardised version by M$) and hand make the PCB stencil as I do for my RF boards.
I find it difficult to believe that anyone who has the initiative and ability to build a working circuit by other means lacks the ability to put together a symbol in KiCad and link it to a footprint. I am 73 and I started with KiCad about 10 years ago.
I have not used KiCad for simulation, but I think that linking a symbol to a model must be pretty easy also. The model would connect to the pin numbers and/or pin names, and should not care about the appearance of the symbol.
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I looked up the data sheet just for kicks.
The symbol required for the ECX10N20 is Q_NMOS_GSD and the footprint is a TO247 (several versions available depending on mounting requirements).
The symbol and the footprints are in the Kicad libraries. There is no need to produce any symbols or footprints.
All you need to do is place the symbol on the Schematic and associate it with your required TO247 footprint.
Are you familliar with the way the Kicad âPackageâ works?
Understandably a new workflow has its adoption costs. Itâs rational to weigh that against the benefits. For me no messy chemicals, no dedicated workspace needed, reliable and reproducible (when mistakes have been ironed out) boards, soldermask, ease of going from idea to prototype, unbeatable prices, means Iâll never go near DIY PCB processes again.
Now, what to do with the old copper clad boards? Maybe make a copper foil hat? 
Yeah I remember this good sw
Back to the OP. Time ago I had to modify the enhance N mosfet symbol in order to get a depletion one. It took me 5 min more or less.
Going back to your question, not wishing to be disengenuous, I done think you have grasped hiw Kicad works OR are coming from another [older] piece of ECAD software.
The KiCAD workflow basically follows the following route - Schematic production, footprint selection (against schematic ccomponents) and PCB creation.
So:-
The schematic editor is there to produce connections between âsymbolsâ . Now these symbols âcouldâ be anything in Kicad. You could produce a picture of a 3 legged dog and label its paws G, D and S
You would then Assign the 3 legged dog symbol to a footprint, say a TO 247
Finally when yoh have given KiCAd all the connection and footprint information tou then draw the tracks.
Now some presifined âsymbolsâ have all the necessary information already setup for you. Others, like your ECX20P10&20 might not so YOU have to tell KiCAD the mussing bits
There is nothing difficult in creating a footprint and a symbol in kicad, it does not take very much time.
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Looks like this may have been a symbolic defeat?
BTW after designing power for 45 years, I had been unaware of Exicon and their MOSFETs. I did check out 1 or 2 datasheets. SFAIK the symbol for a lateral or linear MOSFET does not change relative to the others we use for enhancement mode MOSFETs.
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I am not so favorably impressed by the completeness of their datasheets, butâŚ
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If the device freedom from forward bias secondary breakdown is as good as they imply, this is just the device you need for an electronic load working up to 200V. Infineon makes âlinearâ MOSFETs but that portfolio seems to stop at 100V or 150V. IXYS>Littelfuse does seem to go up even higher in voltage.
- I have not seen a symbol on the Exicon datasheets. But this snip is from a Littelfuse>Ixys device, showing a standard enhancement mode MOSFET symbol.
I think the OP has returned to Visio. Oh wellâŚ
I use and like Visio. I used it for mechanical drawings and also for schematic illustrations (when my real schematic tool was ExpressPCB. That makes schematics that are functionally adequate but not up to what you would publish in an app note.) But Visio makes only dumb drawings so is not EDA.
I think that the OP made an argument for giving up. Teach your kids!!
Is somebody going back to Visio a revisio-nary?
Oooooooooooooh 
Now you have me confusing video and visio. The next thing you know, I will be promoting ClapChimp, or whatever they call that video editor. Is it called ChapClimp or ChipClamp?
I think I will go park my square wheeled wagon on a hill AND use handbrake. Donât worry if you do not understandâŚthis is an inside jokeâŚ
I made a symbol . . . just for you . . .
. . . use it with this KiCad supplied footprint . . .
All will be good 
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The Exicon parts are the only lateral mosfets left in current production. Vertical mosfets donât work well in linear applications these days.
I think the OP has seen Eagle with its combined symbol/footprint structure before.
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Thanks. I might find out in the months to come. I may want to have a 150V electronic load, although I need only 10W. Based on the datasheet, the Littelfuse ought to work and to me it is a little more of a known entity.
Thanks I will need to check out drawio. I guess I am a âroll your ownâ (or is it âre-invent the wheelâ?) sort of engineer. I have one Visio file full of schematic symbols that I created. Creating my own symbols is not a problem in either Visio or KiCad.