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Things to be noted before calculating the TR die temperature

Normally, a transistors gets heated when in use.

We can not ignore its heat.

Therefore, it is required to carefully calculate the heat of TR before use, in order to drive it safely and stably.

This is why this material has been prepared and offered here. We hope this material becomes any help to the users.

 TR

Prior to the die temperature calculation:About usability judgement of a TR chosen

The followings are procedures to make judgement as to whether a transistor can be used or not.

1.Aren't current and/or voltage exceeded beyond the absolute maximum rating even for a moment?
2.Isn't Safety Operating Area(SOA) violated?
3.Isn't die temperature beyond 150 deg.?

Here,an explanation is given details as to "3.Isn't die temperature beyond 150 deg.?". As for "1,2",please refer to the different section [Usable or Not Judgement Method].

 それでは、トランジスタの素子温度を算出してみましょう！




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