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Chapter III : Transistors : Performance of MOSFETs: Avalanche Capability

As a feature of MOSFET * 1, if it is within a certain energy, drain current ID and below the rated channel temperature Tch, there is performance that does not break even if it exceeds the rated voltage VDSS.
This is called avalanche capability, the allowable energy is called avalanche energy, and the current is called avalanche current.

Avalanche capability (energy, current) test circuit, waveform and calculation formula
Fig. 3-10 Avalanche capability (energy, current) test circuit, waveform and calculation formula

*1: Some products do not guarantee the avalanche  capability

Chapter III : Transistors

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