Hi Ahmet,
Capacitor cracking with SAC solders is more prevelant then with SnPb solders.
The reasons are:
1) a larger delta-T from solidification to RT;
2) SAC is stiffer and stronger;
3) SAC creeps slower.
The way to solve the problem is to reduce significantly--or better yet
eliminate-- the solder fillets at the end caps. This can be accomplished by
significantly reducing the soldering pad size on the PCB.

Werner

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