Jim,
It looks like your customers FOD reps are trumping good ESD practice.
Do you also put your product in an ESD bag? What brand of dust caps do
you use? I think the 3M brand may meet the intent of the old mil-spec,
which was non-sloughing.
Jim Carlson
Quality/Configuration Manager
L-3 Communications
Applied Signal & Image Technology
443-457-1111 Ext. 238
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of
[log in to unmask]
Sent: Tuesday, June 07, 2011 6:10 PM
To: [log in to unmask]
Subject: Re: [TN] Connector Dust Caps
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Marsico, James - ES
Sent: Tuesday, June 07, 2011 12:45 PM
To: [log in to unmask]
Subject: [TN] Connector Dust Caps
Hello Technet:
An issue has been raised at our facility regarding the material used for
connector dust caps. As you probably are aware, connector dust caps can
be either conductive (black?), dissipative (pink?), non-static
generating or neither. It has always been our practice to use black
conductive caps to protect connectors from FOD or ESD damage. One of
our customers said that they would not allow us to ship them hardware
with conductive connector caps, since they may shed some conductive
fibers. Not being an ESD expert, I have a couple (few) questions.
1) When would you use a conductive cap over a dissipative one?
Conductive would be used whenever you need to shield the pins below from
potential ESD fields.
2) Would a dissipative cap provide the same ESD protection?
No, dissipative is not a shield.
3) Wouldn't a dissipative cap also shed fibers that are conductive,
but to a lesser degree?
Technically dissipative and conductive are merely orders of magnitudes
different with respect to conductivity.
4) What type of caps would you recommend for keeping out dust and
offering static protection?
I recommend black conductive.
I'm sure that answers I receive will raise more questions. Thanks for
your help,
Jim Marsico
ITT Corporation
1500 New Horizons Blvd.
North Amityville, NY 11701
631-630-5079
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