Spurious Response wrote:

"N Cook" wrote:

Military , aerospace & medical do have derogation from WEEE and RoSH, but
can anyone nail down precisely why they are exempted.

Absolutely. Lead based solder alloys are ****ing superior, and Tin
based, non-leaded alloys are inferior, and have VERY POOR reliability
numbers.

It is really quite simple math.

A mission critical application REQUIRES a system where one does not
have to expect some lame failure mode to creep in due to the utilization
of a VERY POOR, failure mode prone device interconnection methodology.

So pony up your data !

Graham