What is derating of the safe operating area (SOA)?

Calculating the safe operating area according to the ambient temperature (or case temperature) of the semiconductor element.

When the ambient temperature (or case temperature) is 25°C or more, the allowable loss must be limited so that the junction temperature does not exceed the maximum rating, and the safe operating area becomes narrower.

Fig. 1: Derating curve based on MIL-HDBK-217
Fig. 1: Derating curve based on MIL-HDBK-217

Please also refer to the following page.

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