The topic VDSS MOSFET explains to you about a potential difference happened between two terminals of MOSFET, the drain to source terminals voltage of MOSFET will be discussed here.

VDSS MOSFET definition

The VDSS of MOSFET is defined as the maximum voltage that can be applied across drain and source terminals of the MOSFET, and also to gate to source terminals on short-circuited.


  • The VDSS is called the rating of the drain to source voltage without carriers’ avalanche breakdown.
  • The avalanche breakdown voltage could be set by the VDSS rated voltage.
  • The VDSS voltage of MOSFET will also determine the size or thickness of the depletion layer of the n-layer at the MOSFET.

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