Hi Jia I think UltraCad Software do give the calculation for PCB current = carrying capacity. http://www.ultracad.com/calc.htm Thanks & Regards, Kuseswar Prasad =20 Design Flow Verification & Test Team Agilent Technologies, Inc. _____________ TelNet: 284 8514=20 http://www.agilent.com/find/eesof -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] = On Behalf Of qqqwqq Sent: Wednesday, January 16, 2008 1:33 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] PCB current carrying capacity calculation Hi All, =20 I'm using PCBtemp to do the calculation, it's easy to use but may not = good enough. Does anyone have some better ideas/tools or should I run some = simulations by using thermal tools? =20 Thank you in advance, Jia zhao ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net List archives are viewable at: =20 //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 =20 ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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