Electronics Forum | Fri Sep 07 12:19:20 EDT 2007 | guqing
We are having problem to develop lead-free (SAC305) reflow profile for big SMT electrolytic caps. The delta T of the joint of the cap with the rest of the board is too big to fit in the tighter lead-free window. Any suggestions regarding the total pr
Electronics Forum | Fri Sep 07 14:55:25 EDT 2007 | jseagle
Change to through hole or hand solder. we are in the same boat and have not foound a reflow solution. James
Electronics Forum | Thu Jun 19 12:48:32 EDT 2008 | mumtaz
What the hell our you talking about 200 c max? I would think any nolead part is capable of going hi-er that this. I think you are looking at max temps or something that does not make sents for temps you need to reflow.
Electronics Forum | Mon Sep 10 14:42:42 EDT 2007 | cyber_wolf
How big is the cap ? We successfully reflow caps that measure aprrox .750" x 750" at the base and are .678" tall. The ovens we use are Vitronics XPM's.(1230,1040 and 930) We also process these caps through our Omniflow 10. As stated, oven length wi
Electronics Forum | Wed Jul 12 07:33:11 EDT 2017 | bk
Another option you can try is to use solder paste with a dispensing machine and then use a hot air gun to reflow the solder paste on the smd caps
Electronics Forum | Thu Jun 19 14:44:53 EDT 2008 | guqing
Did you ever run big electrolytic caps on your board?
Electronics Forum | Mon Sep 10 08:03:23 EDT 2007 | pavel_murtishev
Good afternoon, What is the difference between your cap and the rest of the PWB? BR, Pavel
Electronics Forum | Mon Sep 10 09:29:52 EDT 2007 | guqing
About 25C difference between the cap joint and the small ICs.
Electronics Forum | Thu Jun 19 15:52:16 EDT 2008 | guqing
So correct me if I'm wrong: you are using a conventional oven (not VP, otherwise you must have mentioned), your big electrolytic caps go through a lead-free profile, which requires 30sec minimum at 230, but your time above 200C on the caps is less th
Electronics Forum | guqing |
Thu Jun 19 14:26:04 EDT 2008
