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July 2008

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Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:
Tue, 22 Jul 2008 10:21:20 -0500
Content-Type:
text/plain
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text/plain (74 lines)
We reflowed thousands of these very same caps in different products in a
previous life, and I don't recall any problems with them from an
operating or reliability standpoint. But that was with a MRT of around
230 deg. C, and a TAL of about 60 seconds.

The bigger problem with them was handling.

Because the two leads coming out from the bottom of the can puts it on a
center fulcrum, any operator who puts their fingers or thumbs on the top
of these cans and rocks them even slightly when handling the assembly
will cause the pads to lift right off of the board. We had to train and
retrain the operators not to touch these parts.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: Tuesday, July 22, 2008 9:45 AM
To: [log in to unmask]
Subject: [TN] Lead-free soldering of electrolytic caps

Dear Technos,

 

I need to solder these babies, see
http://www.panasonic.com/industrial/components/pdf/PIC_FK_SERIES.pdf on
lead-free. We're on SAC305.

 

Please check the last page of the spec, series EEV-Q and EEV-M, the big
cans. I must say that Panasonic does not really help us assemblers by
labelling the parts as being RoHS compliant; they might not have the
banned stuff in them, but they are anything but high-temp. When
designers see RoHS compliant, it's case closed for them and open issues
for us. 

 

How are you guys getting around the poor temperature rating of the
component? Would the cool caps work? Are you soldering them manually?
Should I bother studying the Bi alloys?

 

Thank you,

 

Ioan


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