X7R SMT CAPACITOR RELIABILITY VS SIZE

[felice]

I would like your help on the following; for a given application requiring a SMT X7R Chip cap, 2.2uf@ 50, would it be more reliable to use a 1206 size or an 1812. Would the dielectric thickness be greater in a 1812, hence a bit more robust?
Tks!
Phil

 

[itsmoked]

As much as it would be nice, you can't make a blanket statement on this.

The key is the specified voltage. If you want more robust, use a higher voltage rated cap.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[Comcokid]

Higher possibility of PCB flexing causing capacitor cracking might be the main issue against the larger size part. Other than that, the larger part is more expensive.