- the through-hole LED in question is made by company "EOI ", and their part number is "EOZ-ZARNCD0-DG " (s - according to the component spec sheet (enclosed), the maximum temperature for the component is 260 - the maximum temp and wave contact time we initially used is 249 , 4-6 seconds. We saw some defects after first pass, usually about .2%, but one month as high as 1.5%. After successful testing, there were then some latent defects that occurred at our customer or their end customer. The defects are erratic, sometimes the LEDs work, and sometimes they don't - the supplier recommended a lower temperature and shorter exposure profile so we used SAC305 solder with maximum temp of 244.4 and 3 seconds. There were no defects after first pass and testing, but again we had some latent defects occur at customer - for reference, we run many similar LED from other manufacturers (OSRAM&Lumiled, also spec at 260) at temperatures of 251 and 4-7 seconds and see no such problems. Attached is a wave profile. Please let me know if you seen a similar issue and what caused it. Thanks --------------------------------------------------- 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 -----------------------------------------------------