Hello to all We have an application where a PCB is running continuously at high temperature 125°C with high voltage (800V DC) in internal layer. I would like to perform accelerated test with such PCB at 170°C with bias voltage. My question is : Are there any derating laws regarding tension in PCBs as for components. If the affirmative, do you know where i can find this information (standards...). Looking forward from reading you. Best regards Xavier Lambert --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------