Category: Software
Software Version: LTspice 26.0.0
Hi!
I’m not sure whether I have disabled some warnings, but I’m not seeing the expected behavior for the electrical characteristic check of a diode.
According to the help file:
It is possible to specify voltage, current, and power dissipation ratings for a model. These model parameters do not affect the electrical behavior. They allow LTspice to check if the diode is being used beyond its rated capability. The following parameters apply to either model. These parameters do not scale with area.
Attached is a simple example where both Vpk and Iave are exceeded, yet no warning is generated
Log file :
LTspice 26.0.0 for Windows Circuit: C:\Users\XXX\Downloads\BreakDown_Voltage.net Start Time: Thu Apr 16 15:51:54 2026 solver = Alternate Maximum thread count: 22 tnom = 27 temp = 27 method = modified trap Compress1stOrder = true Compress2ndOrder = true Direct Newton iteration succeeded in finding operating point. Total elapsed time: 0.107 seconds. Files loaded: C:\Users\XXX\Downloads\BreakDown_Voltage.net C:\Users\XXX\AppData\Local\LTspice\lib\cmp\standard.dio C:\Users\XXX\Documents\LTspice\user.dio
Another point: it could be useful to have visibility into all the libraries actually used. In this case, I believe LTspice is only using standard.dio and not user.dio.
Thank you, Emilien
