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SOAtherm heatsink volume

Category: Software
Software Version: 17.1.8


Im using LTspice for thermal modelling a Mosfet circuit. I added a heatsink, but the strange thing is, when you increase the volume_mm3 of the heatsink, the temperature increases.

Left is with 90000mm3, right with just 1mm3

Do you kno this problem? What am i missing?

Best Regards,