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i want to use a capacitor model in LTspice XVII. On the TDK webpage are a lot of models of their capacitors.

I chose the DC bias model (LTspice) of the C3216 commercial grade (up to 50V) C3216X5R1V226M160AC capacitor. After downloading the .rar file i extracted all models in my \LTspice\lib\sum\TDK\C3216 directory.

The .mod file is encrypted for LTspice. So i will not be able to read all specs of their capacitor, but i can use it as 'black box' model at least. The problem is that my LTspice is not able to open the .mod file. enter image description here

I don't know why! The first line of the .mod file says:

* LTspice Encrypted File * This encrypted file has been supplied by a 3rd * party vendor that does not wish to publicize * the technology used to implement this library. * Permission is granted to use this file for * simulations but not to reverse engineer its * contents.

In the file C3216X5R1V226M160AC.asy i found the line:

SYMATTR ModelFile C3216X5R1V226M160AC_b_LTspice.mod

So it should find the .mod file...

I am using LTspiceXVII on win10 x64.

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    \$\begingroup\$ Where did you place the .mod file? If you placed it in Program Files (or wherever the default installation is), it won't work. XVII creates a second path in My Documents, though I wouldn't recommend. It may be better to simply extract them in the folder where your project resides. Placing the symbol is done through F2 > Top Directory drop-down menu. I just tried and it worked for me. If it's another cause, skip this. \$\endgroup\$ Commented Jan 17, 2018 at 8:38
  • \$\begingroup\$ You are right! The place where the .mod file is was the problem. The .mod files where placed in 'user\Documents\LTspiceXVII\lib\sym\myC'. Now i placed the .mod files in 'user\Documents\LTspiceXVII\lib\sub' and it works! Answer the question and i will mark it as solved! Thanks you \$\endgroup\$
    – sepplhans
    Commented Jan 17, 2018 at 14:07
  • \$\begingroup\$ Yeah, I agree, answers need to be answers not comments \$\endgroup\$
    – Voltage Spike
    Commented Jan 17, 2018 at 17:11

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I'll just copy-paste my comment, if you say that did it. If it ain't broken...


Where did you place the .mod file? If you placed it in Program Files (or wherever the default installation is), it won't work. XVII creates a second path in My Documents, though I wouldn't recommend. It may be better to simply extract them in the folder where your project resides. Placing the symbol is done through F2 > Top Directory drop-down menu. I just tried and it worked for me. If it's another cause, skip this.

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