Check out page 11 of 16 in the following presentation (Breakdown voltage comparison): http://dkc1.digikey.com/ca/en/tod/Murata/HighCapMultiCeramicCap/HighCap_Multilayer_Ceramic_Caps.html On page 12 of 16, it claims the cap is heavily affected by DC bias voltage. On the last page, one summary is: a 100UF MLCC ceramic cap can replace 470 uf Tan cap. Funny N. Au Group Electronics, http://www.AuElectronics.com http://www.AuElectronics.com/products http://augroups.blogspot.com/ ________________________________ From: Herbert Graf To: Microcontroller discussion list - Public. Sent: Mon, February 22, 2010 3:36:54 PM Subject: Re: [EE]Overvoltage on Ceramic Capacitors. On Mon, 2010-02-22 at 11:06 -0800, Marcel Duchamp wrote: > On 2/22/2010 10:52 AM, Funny NYPD wrote: > > For most of the electrolytic capacitor, they cannot be used when > > application voltage is higher than the rated voltage. For ceramic > > Capacitors, they won't be damaged if the application voltage is > > higher but doesn't go above 1K Volts~a few Kilo-volts. > > > > Where did you get that idea? Voltage ratings are not "optional"... Agreed. Perhaps what he was referring to is ceramic caps are more "forgiving" if you get close to the max. Tantalums tend to explode pretty much right at their rated maximum. TTYL -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist