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I bought the P36NFO6L MOSFET n-channel .

enter image description here

Where is the pin connected to the p-type substrate. Is this thing over here?

enter image description here

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The tab ties to the drain of the device, same as pin 2.

There is no separate substrate connection for this FET. The substrate (body) is internally tied to the source to ensure the body is correctly biased. That's the reason for the body diode in the diagram. More about that here: How should I understand the intrinsic body diode inside a MOSFET?

There are FETs with separate body connections, allowing the user to control the characteristics of the FET, but this isn't the norm for power FETs like the one you show.

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  • \$\begingroup\$ The substrate has the same voltage with the source correct? \$\endgroup\$
    – McCarter
    May 13, 2020 at 22:45
  • \$\begingroup\$ Yes. See the reference I linked. \$\endgroup\$
    – hacktastical
    May 13, 2020 at 22:47

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