Ioan,
Predicting the fatigue properties would need a analysis with quite a lot
of information about the whole construction, not only the cap with
terminals, but also your whole board etc. We have several vibrators and
shock machines and also people who can handle calculations in ANSYS and
other programs, but I'd say first that we would never allow a cap like
that to hang by itself in its terminations. Never! Caps that loosen are
dangerous. So, instead of wondering, I would secure the cap, either by
oldfashioned strapping or modern glueing. We had an incident with a non
secured cap in a missile, I analysed the remnants of the electronics,
and found that the cap had loosened during flying, vibration had made
the cap jumping around and damaged other components, and the whole
missile went wrong. So, if you deal with MIL parts, secure the cap!
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: den 30 augusti 2006 14:25
To: [log in to unmask]
Subject: Re: [TN] Reliability of Ni pins
Inge,
I am talking about this one
http://www.evanscap.com/THQ3-LSpecTHQ3pdf.pdf and wonder if the pins are
more or less resistant to flexure than copper. The caps are soldered on
the board, but the body is not glued. In operation, the board will move
back and forth, so the body of the cap moves, pulling on the leads.
Imagine the central pin being of a material I've forgotten (Ru I
believe) with the Ni sleeve on top of it. Not exactly a flexure
resiliant construction...
Thanks,
Ioan
-----Original Message-----
From: Ingemar Hernefjord (KC/EMW)
[mailto:[log in to unmask]]
Sent: Wednesday, August 30, 2006 2:33 AM
To: TechNet E-Mail Forum; Tempea, Ioan
Subject: RE: [TN] Reliability of Ni pins
What pins? For connectors? For soldering? What application? What size?
What watts?
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: den 28 augusti 2006 16:31
To: [log in to unmask]
Subject: [TN] Reliability of Ni pins
Hi Technos,
I would like to know how the Ni pins measure up against Cu in terms of
short term (thermal shock and vibration) and long term reliability.
Any experiences with that?
Thanks,
Ioan
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