not in my opinion.  this is fine.  I think the verbiage IPC uses is that the 
lead must be discernable in the solder joint, and .040" will be plenty 
discernable.  If you are worried about mechanical reliability of the joint I 
bet you could subject this joint to any stress you would be able to subject 
a .040" longer lead protrusion to.
my $.02.
Lenny Carter
Design Engineer
ERG, Inc.
www.ergpower.com


----- Original Message ----- 
From: "Phil Nutting" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 05, 2007 11:17 AM
Subject: [TN] Connector pin protrusion


Good Afternoon,

In reviewing PTH connectors it looks like the standard pin length (for
the through board connection) is double the board thickness.  For an
0.062 board the pins are 0.120" long and for a 0.090 board the pins are
0.180" long.  We have some connectors that have 0.130" long pins that we
want to use in an 0.090" thick board.  I maintain this shorter pin will
be problematic to solder reliably.

Am I on the right track?

Phil

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