What is the mfr and pn?
     
     What's the environment:
     
                              high particulate?
                              cable flexing?
                              air flow/no air flow?
                              drastic temp swings?


______________________________ Reply Separator _________________________________
Subject: DES> Connector Reliability
Author:  [log in to unmask] at internet-mail
Date:    4/29/96 12:37 PM


We have a header in a prototype system with brass sprung contacts with gold 
plate over nickel, contacting pins which are also gold-plate over nickel.
     
This connector carries 3A, and is showing a strong tendency to increase in 
contact resistance in field tests (up to 150 mOhm). Removing and refitting 
the connector takes the contact resistance back to "as new" (<40 m Ohm).. The 
connectors have been examined by a test lab and pronounced OK, with no 
contamination. No deposit or oxidation is visible on the surface.
     
Has anyone seen similar failure mechanism? What's the physics?
     
     
Terry Davey --------------------------------  [log in to unmask]  ------