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High Amp MOSFET pins?

I have bought two 75N06 MOSFET's rated a 75A that I am intending on using in an inverter circuit I will build the inverter will be powered with a 9v battery that will only trigger the MOSFET's that will lead to a modified microwave oven transformer and a car battery (65Amp). With the car battery I intend to draw about 200Amps from. At 50-60Hz the MOSFET's( I'm guessing) will be able to take that current but I am not sure if the pins will be able to handle that current the pins are only 0.34mm(0.01339Inches) by 0.6mm(0.0236Inches) thick so will it be able to handle 200Amps?
If not could you suggest how to do this possibly with a few lesser current MOSFET's (lesser will equal a bit cheaper) in parallel?
Thank you for any suggestions.

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verence6 years ago
As the MOSFETs are rated 75A (maximum continuous drain current), there is no way to get 200A from them. Period.

Your problem is/are not the the external pins but the even thinner bonding wires inside the device. They will melt (eventually 'explode') long before the pins give you trouble.

Also think about the size of the copper PCB traces. IIRC, you need a 1mm wide trace of am 35µ layer (standard PCB) for 10A of current, making that 20mm ( ~ 0.8") for 200A. (I'm scratching this number from the back of my head, might be off a bit)

For such high currents, TO220 is just not the correct package. Try to find a MOSFET in another package or parallel some (8, 10 or more) 75N06.
The MadScientist (author)  verence5 years ago
What do you think of some IRFP260's, IRF150's or IRFP150's in parallel?
The MadScientist (author)  verence5 years ago
I am not using PCB boards just basic breadboards and I have looked at some different MOSFET's and I think 3 IRFP460/470's in parallel will do the job at 2Hz the IRFP460's can do about 80Amps the 470's 96Amps.
I can increase the frequency to about 400Hz if it is necessary.
Sure you can !
IRFP460 MOSFET's are fast group take a look at the specs.
400 cycles per sec = 1/400 = 2.5 milliseconds per cycle

Here's how to answer this question for The MadScientist you are :)
On the second page you can see the speed of the MOSFET
  • Turn-On Delay Time ========     18 ns  ( Nano Seconds )
  • Rise Time ================    59 ns
  • Turn-Off Delay Time ========= 110 ns
  • Fall Time =================    58 ns
              For a total of 245 ns = o.245 uS = o.000245 millisec
              That is over 4 Mhz for the MOSFET
              Just a little faster then 400 cps.
A




iceng6 years ago
I agree with verence 75 amps is IT.
MOSFETs will share current unlike bipolar transistors. You could put three in parallel and have an engineering safety factor of 25 amps ( I would use four in parallel myself ).
Don't forget MOSFETs are very very Fast.
That means, if you make a very fast gate driver ON ==> Off, a 6" length of wire to your load can generate enough inductive kick voltage to trash one of your semiconductors in less then a microsecond.

A
Well, 75 A is continuous, and if I'm being picky, and these things are in a switching mode, you might get a peak current rating >>100 A, That said, if you're into that kind of value engineering......

Steve