Techneters, I have to decide on a lead-free coating for a PCB. My natural tendency (based on previous experience) is to use immersion tin. There is one major issue - the PCB surface is in contact with bronze surface for safety grounding. How will the immersion tin behave along time? In another instance I selected ENIG, because the surface contact is used as a power conductor, and will conduct continuously 60A on an area of 220 square mm (~.35 square "). Will the surface contact withstand this current? Is gold plating better for this application? Regards Ofer Cohen Seabridge Ltd. - A Siemens Company --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------