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Phil,
This is "new build" although not built by my company. They are post-plated min. 40u" (1.02 microns) matte tin (lead free) over min. 80 u" (2.04 microns) nickel. The tin plate over nickel is probably reflowing during wave/selective/hand soldering to the PCB, but I don't know this for certain as I've not observed it personally, only the end result.
Ed Popielarski
Engineering Manager
970 NE 21st Ct.
Oak Harbor, Wa. 98277
Ph: 360-675-1322
Fx: 206-624-0965
Cl: 949-581-6601
https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Thursday, June 06, 2013 12:46 PM
To: TechNet E-Mail Forum; Ed Popielarski
Subject: RE: Dewetting on high current connector
Hi Ed,
Was this a solder coated blade connector? Dewetting normally applies to something that has been exposed to solder and I am not sure why a connector would get a soft metal (solder) finish. Is this a field return (can't tell if I am seeing corrosion) or freshly produced item?
Phil
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Popielarski
Sent: Thursday, June 06, 2013 12:00 PM
To: [log in to unmask]
Subject: [TN] Dewetting on high current connector
Greetings fellow 'netters,
I have discovered a dewetting condition on high current blade connector(s) which causes me to raise an eyebrow. I can't find any scholarly articles discussing the long term effect such an irregular surface at the material contact interface (photo located at http://stevezeva.homestead.com/Terminal_de-wetting.JPG ) will have on connection integrity at high current. This is an extreme environment automotive application with MTBF expectations in excess of 10 years.
Any guidance and/or professional opinions would be greatly appreciated.
As always, thanks to Steve G. for sharing his webspace with us!
Ed Popielarski
Engineering Manager
[Description: FullLogo]
970 NE 21st Ct.
Oak Harbor, Wa. 98277
Ph: 360-675-1322
Fx: 206-624-0965
Cl: 949-581-6601
https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
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