Phil

It is not only the shock but also the time of the acceleration that's applied and, very important in my opinion, how the PCB is fixed and in which direction of the board the shock is applied since it is not just the force resulting from acceleration and the mass of the components that destroys solder joints and components but the shock wave that travels trough the PCB will cause a deformation of the board and this is even worse. 
I couldn't say what the BGA's will say to the shock. But I have the feeling that the discrete SMT's will have no problems with the force coming from their mass.


Best regards

Guenter

Guenter Grossmann

Swiss Federal Institute for Materials Testing and Research EMPA
Centre for Reliability
8600 Duebendorf
Switzerland

Phone: xx41 1 823 4279
Fax :      xx41 1823 4054
mail:     [log in to unmask]

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