Just my two cents, but I don't think your engineer
will achieve 3 times the power rating he's looking
for.  Resistor power ratings are basically for free
space.  The middle resistor sandwiched in between
two other resistors and the bottom resistor won't
be able to radiate the way it's supposed.

Doug

> [log in to unmask] writes:
>
>  Hi Folks,
>
>  We've got an engineer who wants to stack 1206 resistors 3 high in order to
>  achieve a larger power rating. While it is intuitively obvious to us that
>  this is NOT the way to go, we are at a loss to find any published documents
>  that caution or forbid the practice.
>
>  Can anyone cite a published source that can give more specific "rules or
>  guidelines" on this subject.
>
>  We've searched, J-STD-001, SM-780, SM-782, A-610, and R-700
>
>  Help!!!!!
>
>  REGARDS
>  Sherman Banks
>  [log in to unmask]
>  408/481-6047

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