I am not sure but I thought it was 12 grams or heavier, If there is experience
with this part or assembly that shows possible problems then  I would secure it to board.
If this is a proto type then you might want to do some testing before requiring added process.
Just try and keep external copper traces or vias away from RTV locations in case component needs
to be removed.

regards,

Greg Scott
Cray Inc.

Ken Patel wrote:

> Greg,
> What if the part is SMT inductor and leads are nothing more than a wire of 20 or 22 gauge? Two
> recommended pads are narrow strips (80 X 700 mils).
>
> Re,
> Ken Patel
>
> Greg Scott wrote:
>
> > IPC-D-275   section  4.1.8.1
> > Components heavier than 5 grams per lead  should  be secured using
> > mounting clamps or adhesive.
> >
> > This is for vibration and shock prevention.
> >
> > Ken Patel wrote:
> >
> > > Does anyone know the magic weight number after that application of RTV
> > > or any mechanical means to hold down is recommended?
> > >
> > > Re,
> > > Ken Patel
> > >
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