>
>Mechanical damage of the TO-220 package (if heat sinked) is a common problem.
>And JRC makes their leads too stiff (steel rather than copper) IMHO.

We saw that problem, and made a die to bend the leads. Still had loads of
failures, operating well within spec.
Gave up, and used 7805's instead, and went back to near-zero failures.
I don't remember the vendors though. Probably NS and TI.

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