Author Topic: Going over rated Power Dissipation of MOSFET (Read 838 times)

help_me_pick_username · « **on:** November 08, 2019, 02:46:16 am »

I have a 30N06l which is rated for a power dissipation of 79w. If I have adequate cooling, can I dissipate more heat with the MOSFET?

ejeffrey · « **Reply #1 on:** November 08, 2019, 04:53:08 am »

79 W is only with the case at 25C -- i.e., perfect heat sinking. Unless you have chilled water cooling you aren't going to be able to even reach 79W.

wraper · « **Reply #2 on:** November 08, 2019, 05:14:14 am »

Under realistic (good) cooling don't push more than 30W out of it if you want to have any reliability. And by good I mean either actively cooled with fan or just HUGE heatsink.

viperidae · « **Reply #3 on:** November 08, 2019, 06:12:14 am »

You'd need a heatsink at -15 degrees to run at 79W. The case to heatsink thermal resistance is 0.5C/W, so to keep the case at 25C the heatsink needs to be 79*0.5C lower.