What are the parasitic diodes between the drain and source of the MOSFET?

A parasitic diode, called a body diode, is formed between the drain and the source of the MOSFET.

Fig. 1:MOSFET cross-section and body diode equivalent
Fig. 1:MOSFET cross-section and body diode equivalent

The figure below shows the positions where body diodes are formed in MOSFET cross-section, and the equivalent circuitry including parasitic devices.
For MOSFET used in these applications, our data sheet lists the specifications of body diodes. However, the items specified vary depending on the product.

FAQ below also provides explanations. Please refer.

Back to FAQs of MOSFETs / Bipolar Transistors / IGBTs

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