Electronics Forum | Wed Aug 24 16:30:10 EDT 2011 | hussman
Low and behold, the answer has been found. I guess 2512 parts are not used inthe automotive wolrd due to the fact that they crack during thermal cycling!
Electronics Forum | Thu Sep 15 07:03:38 EDT 2011 | mosborne1
This looks like a flux problem to me. I would check the specific gravity of the flux. Also check the thermal profile of th e wave solder process.
Electronics Forum | Wed Sep 14 09:19:30 EDT 2011 | swag
Target those specific parts/leads with a thermal-couple and a mole and try to get the peak reflow temps up to 225 C. It's not a cure but it will improve the apperance of the solder joints.
Electronics Forum | Mon Sep 26 11:22:38 EDT 2011 | kkay
Has anyone used a thermal profiler on a select solder program? We would like to know which brand anyone has had good results with. Thanks
Electronics Forum | Fri Jan 27 07:30:54 EST 2012 | scottp
We're in the high rel market and use a lot of 5 mil stencils. They give plenty of paste to meet IPC class 3 and survive over 1000 cycles of -40/+125C thermal cycle testing.
Electronics Forum | Mon May 14 16:36:58 EDT 2012 | davef
You're thinking correctly in trying to improve your process. Can you change to a more active flux? Look at the copper that connects to the center pin. You may need to relay-out the board to add a wagon wheel style thermal relief in that area.
Electronics Forum | Thu Feb 07 08:10:12 EST 2013 | emeto
Thank you all for the input. There is another concern. Do you consider wave soldering or selective soldering as a thermal cycle too?
Electronics Forum | Thu Mar 21 22:46:37 EDT 2013 | padawanlinuxero
Do you have the thermal profile? Once I invited my nephew to my work and saw the reflow oven and saw how it work and the first questions was : "can we make a pizza uncle?" :o) I always try to do just that even with a small amount of dough :o)
Electronics Forum | Wed Apr 03 14:40:13 EDT 2013 | bandjwet
During the reflow process what are you finding most effective for shielding temperature sensitive components? Ceramic shields, FR-4, sheet metal, machined high temp plastic, cermic non-woven shields
Electronics Forum | Wed Apr 03 18:55:16 EDT 2013 | hegemon
We have had success with both thin folded sheet metal "cans", as well as Aluminum Tape. In some cases it is just not possible to prevent exposure when in convection reflow, so those parts might have a "hand add" instruction for later mounting. 'heg
