Hello, A circuit shown below was built in the attached LTspice.The R6 load is works almost as i want it.
However the real life is not a simulation.Is there a way you reccomend me to proech my mosfet from burning from un wanted high spikes of currents?
Thanks.

 

You are attempting to put ~30-Amps through a device that is rated for only ~7-Amps Max.
And,
It's contained in a tiny SMD-Package that can not dissipate very much HEAT, ( only around ~2-Watts at best ).

These circumstances will guarantee that the FET will smoke almost instantly.
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Hello LowQcab, very very good advice.I need aN channel mosfet with 60V and 35A pulsed rating.
Also rdson 9mohm will be good .
I tried to look both on NMOS and PMOS but i could not find a fit.
Could you reccomend some device i could use?
maybe i need two such SQ3426EV mosfets in parralel?
NMOS: filter
https://www.mouser.co.il/c/semicond...nel&vds - drain-source breakdown voltage=60 V

PMOS:
device with 30V Vds problem.

maybe

 

I don't know exactly what your Project is designed to accomplish,
so it wouldn't be practical to attempt to recommend a FET.

ALL of the details are important !!!!
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Hello , my question is can I use two such mosfets that you find problematic in parralel .
To overcome this current rating problem I got ?

if yes what is theit propr way to combine their currents?
Thanks.

 

I think it's time to explain what the project goals are.
Trying to solve your problem without understanding the "big picture" quickly becomes unproductive.

 

This might be missing your point, but I would suggest using a high side driver with built-in protection unless you are building something in really high quantities and need to minimize the BOM cost. I don't have a particular part in mind that meets your 60V and 35A spec, but it might be worth checking out what Infineon offers. I tested high side drivers from five companies some years back and found it difficult to get enough heat sinking to most of them to drive even close to their specified current, and I found ways to blow most of them up by overloading the output in one way or another. The Infineon BTS5012, on the other hand, easily exceeded its spec and has proven to be extremely robust. I have also used the ITS41K0S for small loads, and the BTN8982 half H-bridge for driving big electric actuators at 12V and 24V with good results. I have been connecting the heat sink pads to PCB floods for heat sinking which makes them difficult to solder but otherwise straightforward to build (no separate heat sinks).