Hello people!
If losses in my MOSFET is areound 30W and in datasheet it says that it can disspate 1.67KW( ofcourse at Tj=25 C, but assuming my Tj=25 C). So do I need a Heat Sink...
Thanks in advance
Hello people!
If losses in my MOSFET is areound 30W and in datasheet it says that it can disspate 1.67KW( ofcourse at Tj=25 C, but assuming my Tj=25 C). So do I need a Heat Sink...
Thanks in advance
What's the MOSFET datasheet? 30W sounds too high for most single package MOSFETs, regardless of heatsink size since there are diminishing returns as heatisnks get bigger.
His claimed 1.67KW sounds even worse - assuming that's correct?, then it's a seriously large device, and 'might' be able to dissipate 30W with no extra heatsink.
With a 1600W rating, it's presumably a "module" style for bolting to a heatsink.
On their own they have pretty bad thermal resistance to air as most of the body is plastic, plus just one polished metal surface.
eg. **broken link removed**
Edit - just noticed the "back order" delay on those - 2020!
What's the MOSFET datasheet? 30W sounds too high for most single package MOSFETs, regardless of heatsink size since there are diminishing returns as heatisnks get bigger.
With a 1600W rating, it's presumably a "module" style for bolting to a heatsink.
On their own they have pretty bad thermal resistance to air as most of the body is plastic, plus just one polished metal surface.
eg. **broken link removed**
Edit - just noticed the "back order" delay on those - 2020!
He was presuming a large module, rather than a single device - as already mentioned dissipating 30W is like a soldering iron (and will get that hot) - so you're likely to need a decent heat sink.
What are you actually trying to do with such a serious device?.
If it's a design that is suppose to work on space, all heatsink dissipation must be by pure IR radiation - no conduction.
That means a large flat plate (or use the walls of a metal enclosure) rather than finned heatsink for air-conduction cooling.