Dear all Recently, I check two kinds of tan capacitors, one is of 10uF and the other is 100uF. The both packages are 3528. To my surprise, the impedance at 300KHz of the two kinds of capacitors are about same. Could anyone told me how does the capacitor vendor define the value of capacitor? Best Regards Zhangkun 2005.1.11 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu