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Question of Tj(MAX) for Pd calculation.

Other Parts Discussed in Thread: CD4049UB

Could you please teach us?
Which Tj(MAX) should we use for the Pd calculation of CD4049UB? 125 deg.? Or, 150 deg.?

I know we must use 125deg. to the Tj(MAX) for Pd(MAX) calculation usually.
However,the maximum operating temperature of CD4049UB is 125deg..
If Tj(MAX) is 125deg., Pd(MAX) becomes 0W when TA=125deg..

Best Regards,