Stupid Question

[SJFE]

Um are fets conductive? Say if you place a piece of metal across the top of them?

[Flying Scotsman]

That is a great question. I believe all fet's are conductive

[deestingray]

I also believe that they are conductive.....I know that if they get water on them, they aren't very happy little FET's. Usually results in smoking ones.
If you dismantle an aircraft esc, you will find a thin layer of a sticky rubbery type mat that seperates the FET's from the heatsink. Based on that, I would say that they are conductive to a point.

[SJFE]

If you dismantle an aircraft esc, you will find a thin layer of a sticky rubbery type mat that seperates the FET's from the heatsink.

Thats exactly why I asked. I take the heat sinks out of the Hex esc's all the time. I was wondering if those pads where just for transfering heat or to insulate.

[Darin Jordan]

The short answer is NO... The black part of the FETs (the silicone) is not conductive... those water cooling plates on your Castles, etc., lay right on top of them, or at least they do on mine and most of those around here... For example, on my copper cooling plates, I put heat transfer compound on the plates, lay them on top of the FETs and heat shrink the assembly...

Obviously, the metal leads are conductive... so you wouldn't want metal across those...

That "sticky rubbery type mat" that some use is a heat transfer tape... the new Hydras use a silicone type material, which dries somewhat and holds everything in place... But the cooling plates that existed prior (from Fuller's, etc) were simply aluminum plates that you'd slide on top of the FETs... Ray would provide Kapton tape, but it was only there to supposedly help to transfer heat... We've always discarded that and just used CPU heat transfer compound (white paste) to help get more heat out... but it doesn't isolate electons.....

... it doesn't need to, because the silicone doesn't conduct them...

Hmmmm.... I guess I ended up giving a long answer after all... ... Hope this helps...

[SJFE]

Thats what I was looking for Sir. Many thanks :D.

[Mich. Maniac]

for sure thay arent. I put my plates right to them. good question though. I thought I would find out myself rather than ask. thanks god they dont conduct otherwise id have to buy 3 esc's

[FLEETMASTER]

Water fries them though,ask me how i know............

[FE_Chris]

Uhhhhhhhh...whats a FET?