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Are the characteristics of a MOSFET the same in the reverse direction?

Latest Updated:04/01/2008

Question:

Are the switching characteristics of a MOSFET the same even if a current flows between the source and drain of an FET in the reverse direction?

Answer:

No. The FET has a body diode between its source and drain, so the current flowing in the reverse direction is the forward current of the diode. Consequently, the current flows through the diode when the ON resistance of the FET is high, and the FET cannot perform its switching operation.

 

Suitable Products

Power MOSFETs