Hi All, Engineering wants to solder a few jumper wires to press-fit pins on production boards. I am not completely comfortable soldering to press-fit pins and want to get input from others because there appears to be conflicting information between previous posts on this subject and IPC-610. I have read concern that the heat from soldering (hand soldering in this case) may compromise the press-fit connection - the theory being that the hole is already physically deformed and under some degree of stress by design of the press-fit pin and that heat may produce additional unintended stress. Since we are soldering a jumper wire the entire hole will not be filled and there will be a limited amount of heat introduced. Having never seen rework wires soldered to press-fit pins on production boards, I don't know if this is really a risk. Has anybody done this? The connector vendor is not willing to comment because they don't have information about this, so that adds to the unknown. The second issue I have read about is that the design of the press-fit connection prohibits the formation of a properly wetted solder interface between the pin and plated through hole. Since we are talking about a solder connection to connect a jumper wire to end of the pin and not for an electrical connection of the pin to the board I don't think this applies to our case. On the other hand, IPC-610 does have a section (4.3.2.1) that gives criteria for soldering press-fit pins so they must think it is OK. It states that press-fit pins are not intended to be soldered, but if soldering is required it gives criteria. So, my quandry is...is soldering jumper wires to press-fit pins a risk or not? Thanks in advance for any and all help. Bob --------------------------------------------------- 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 -----------------------------------------------------