Allen, Is this a component which was designed as a through hole and afterwards went through lead forming for smt? I ask you because you said that the leads are round. If so, your main problem should be coplanarity of the leads and solderability, I think. I would look only for solder height - reaching the 1/2 of the lead diameter on all leads should be fine. If there is no bending, the solder joint should have a nice meniscus and not touch the component body. I hope this helps. Gaby "Kluz, Allen E." wrote: > This is on the top side of the pcb, using a surface mount part. I have the > '94 IPC 610 book, looking on pg. 123, under SMT assy. > > Sorry, your drawing doesn't help for my application. > > -----Original Message----- > > From: Nancy Trumbull [SMTP:[log in to unmask]] > > Sent: Friday, September 17, 1999 11:19 AM > > To: [log in to unmask] > > Subject: Re: [TN] maximum solder joint thickness > > > > Hi Allen, > > I would like to help you but I'm not sure about your question. > > Please give a little more information. > > 1. What side of the PCB > > 2. Plated through or not > > 3. Joint = Solder thickness yes > > 4. What page are you looking on > > > > Your question is how thick can the solder be from the pad to > > the lead. > > Please open the attachment and let me know if this is what your > > are asking. > > Jack Crawford will know I'm sure > > Or e-mail me > > [log in to unmask] > > > > Nancy > > >>> "Kluz, Allen E." <[log in to unmask]> 09/17/99 10:42AM >>> > > Technetters, > > I've been searching through the IPC-A-610: Acceptability of Electronic > > Assemblies Guidelines, and can't find anything on guidelines for maximum > > joint thickness (from the pad to the lead). The manual refers to as the > > "G" > > dimension, which clearly identifies the minimum thickness'. Does anyone > > know of guideline for this and where it's stated? I'm looking for a round > > lead in particular. > > > > Thanks in advance. > > > > > > Allen Kluz > > Supplier Quality Engineer > > [log in to unmask] > > > > ############################################################## > > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > > ############################################################## > > To subscribe/unsubscribe, send a message to [log in to unmask] with > > following text in > > the body: > > To subscribe: SUBSCRIBE TECHNET <your full name> > > To unsubscribe: SIGNOFF TECHNET > > ############################################################## > > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > > additional > > information. > > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > > 847-509-9700 ext.5365 > > ############################################################## > > << File: Joint.doc >> > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################