If I were in this situation, I'd be reaching for an electrolytic cap=20 - either through-hole or SMT. I don't purchase electrolytic caps=20 that don't work down to at least -40. Sanyo used to be the only=20 supplier that I was aware of who met this requirement but now many=20 manufacturers have caps that work down to as low as -55C. Sanyo's=20 electrolytic capacitors also have the advantage of having extremely low ESR= .. If you have the room, use a leaded radial cap but lay it down, then=20 cover with conformal coating. If you don't have room for that, leave=20 it standing but support it with conformal coating or cast it in epoxy. I know that very-high-value MLCC can be reliable (I'm using some=20 100uF 10V parts that are absolutely tiny) but I honestly don't know=20 how they stand up to flexing caused by vibration. dwayne At 02:42 AM 5/23/2013, Electron wrote: >Hello, >as a possible alternative for five MLCC 0603 10uF 6.3v caps in foresee of >the next PCB respin, I am seeking for a capacitor type that: > ># is damn cheap and easy to source. ># is extremely reliable, even under strong mechanical vibrations. ># will not give problems when covered by epoxy resin. ># is possibily not too big, space-wise. ># needs to have the above qualities at 10uF values and >=3D6.3V > >the following electrical characteristics are NOT too important, as the cap= s >will be used for filtering but not on a critical time-constant, just to re= move >some noise. So I can trade these qualities: >Temperature coefficient can be bad. >Tolerance can be high. >It won't be used at temperatures higher than 60C or lower than -20C. > >Ceramic, tantalum (god forbid!), electrolitic, polystyrene (10uF? I doubt)= ? > >What do You suggest? :) > >Thanks! >Mario > > >PS: this time no duplicates.. woohoo! :D > >-- >http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .