KiCad 9.0.3 External Diode (1N4148) Simulation

Schematic Simulation (Ngspice)
1

Need help to find 1N4148.mod or a simulation model for KiCad. I tried several
from Microcap On_Semi.lib.

Apparently, KiCad is not able to parse these models.

**** error: no model named
.MODEL 1N4148 D BV=100V CJO=4PF IS=7E-09 M=.45 N=2 RS=.8

  • TT=6E-09 VJ=.6V

**** error: newline expected at character 20
.model 1N4148 (Is=5.84n N=1.94 Rs=.7017 Ikf=44.17m Xti=3 Eg=1.11 Cjo=.95p M=.55 Vj=.75 Fc=.5 Isr=11.07n Nr=2.088 Bv=100 Ibv=100u Tt=11.07n)
-------- platform ------------------------------
Application: KiCad x86_64 on x86_64
Version: 9.0.3-9.0.3-0~ubuntu25.04.1, release build
Platform: Ubuntu 25.04, 64 bit, Little endian, wxGTK, X11, xubuntu, x11

2

I am not very good with ngSpice in KiCad myself. I do know it is a capable simulator, but it can be a bit finicky to get a simulation started. To get started there are a bunch of completely built simulations posted on this forum on several threads. For example:

3

KiCad will parse both models, if done correctly. Copy either model into a file, e.g. diodes.lib. Place the symbol, attach the model, check for the pin assignment.

Btw. there is no line
.model 1N4148 (Is=5.84n N=1.94 Rs=.7017 Ikf=44.17m Xti=3 Eg=1.11 Cjo=.95p M=.55 Vj=.75 Fc=.5 Isr=11.07n Nr=2.088 Bv=100 Ibv=100u Tt=11.07n)
in On_Semi.lib. What you have shown is buggy. At least the model type ‘D’ is missing.