Phil, have you studied the list of precaution for 'fusing' resistors, as some metal oxide resistors are called? Example: not to be used if you have strong electromagnetic fields nearby (induction in spiral metal film ) not to be used in case of high electrostatic fields not to be used too close to other heat generating components (metal film resistors generate intense spot heat and need good cooling) not to be used for high puls current without derating there is more to say, but I couldn't remember what at the moment. John Maxwell may have more to say, grandson to great Maxwell , he will know well about maximums ...he-he /Inge ----- Original Message ----- From: "Phil Nutting" <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, March 26, 2009 5:43 PM Subject: [TN] PTH resistors arcing to LPI covered etch Good afternoon, We have been experiencing some issues with the end of metal film PTH resistors arcing through the LPI solder mask to the etch. Is this something others have seen? Short of applying Kapton under the resistor, lifting the resistor up or completely rerouting the etch, has anyone found another solution? Thanks in advance. Phil Note: All the information contained in this e-mail and its attachments is proprietary to Kaiser Systems, Inc. and it may not be reproduced without the prior written permission of sender. If you have received this email in error, please immediately return it to sender and delete the copy you received. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------