LTSpice ISO modeller
https://www.analog.com/jp/technical-articles/ltspice-models-of-iso-7637-2-iso-16750-2-transients.html

Resistorer pulsenergi
https://www.vishay.com/docs/50060/pulsecapabilities.pdf

Toleranser för parallell och seriekopplade resistorer
http://paulorenato.com/index.php/109

Online-plotter
https://www.desmos.com/calculator