So far I have used zener diodes to protect the MOSFET gate and it worked, but they need a high value resistor to protect the zener. I want to switch to TVS clamp diodes, since I understand that is what they are made for. Please tell me if my idea of the protection circuit is okay? I also want to mention that I don't need fast repetitive switching (like PWM) since I only use MOSFETs to turn on/off some loads. In fact, I need to slow it down intenionally to minimize the current spike when switching capacitive loads. So the RC filter needs to be present. But I am concerned about that resistor power rating. When the TVS clamps, all the peak voltage drops across that resistor. The resistor I selected is a 1206 anti-surge smd chip and it is said to be able to withstand 36W for 10ms. What do you think? Or maybe I shouldn't worry about that resistor, because, if such a large spike were to occur, that can destroy the resistor, other components would already be burned... ?

The MOSFET: https://www.lcsc.com/datasheet/lcsc_datasheet_2411201843_VBsemi-Elec-AFN4486WS8RG-VB_C41369979.pdf
The TVS: https://www.lcsc.com/datasheet/lcsc_datasheet_2409291603_TECH-PUBLIC-SD05C_C907858.pdf
The Resistor: https://www.lcsc.com/product-detail...YAL-Uniroyal-Elec-AS0606J0101T5E_C560558.html

 

Thanks for the data on each part. That really helps.
Where are you getting the signal for the Gate? What does the waveform look like? How are away is the signal source and the MOSFET?
I think you worry too much.

 

In my current project, I have one MOSFET dirven with a signal from a GPIO pin of a Raspberry Pi Pico, and another one by a voltavge of the power rail... I don't know how far will be the sinal sources, as the PCB is not yet designed, but I will try to keep the traces as short as possible.

 

The GPIO from the Pi is 3.3V if I remember correctly. That is not much Gate signal. Supremely your MOSFET looks pretty good at 3V.
If all was on the same PCB I don't use Gate protection. Because the Pi can unplug from your PCB I worry about static.
Think about what if the Pi was removed or is not there and power us turned on. The MOSFET Gate will float. Connect a 100k Gate to Source resistor to pull the Gate down to 0V. Also when the Pi powers up the outputs are tristate. The gate voltage is not known during the boot up time and maybe for much longer. I think that is a very important reason for a G to S resistor.
I don't see a reason for a special Gate resistor.