I would like to thank everyone for their responses. Once again, I see a
demonstration of the expertise that exists in this forum.
-doug
From: POWELL, DOUG
Sent: Thursday, June 19, 2003 10:48 AM
To: EMC-PSTC (E-mail)
Subject: PCB marked for UL 94V-0
Hello group,
An interesting question
In a message dated 6/19/2003 2:46:15 PM Eastern Standard Time,
drcuthb...@micron.com writes:
Doug,
I believe that 94V-0 indicates that the board is self-extinguishing. How
about lighting it with a flame, or a glowing PCB trace, and then remove the
flame. The board fire should go
out.
First of all I would update the note to say the board manufacturer must
be a recognized printed wiring manufacturer, and then call out the flame
rating you need on the board. You'll need the manufactures name or trademark,
board model (single or multilayer), and the flame ratings stamped on
Bryan -
The only required markings are manufacturer's name and type
designation. Marking the flammability classification is
optional.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
From: Cole, Bryan
All -
For those not familiar with Greg Gallucio's background, he
used to head up the plastics and printed wiring boards
(PWBs) group at UL's Melville, NY, office (among other
things). During my tenure at UL, I also did work in those
two product categories; my wife spent many years working
with
To: EMC-PSTC (E-mail)
Subject: PCB marked for UL 94V-0
Hello group,
An interesting question came up about validating printed circuit board raw
material. In searching for alternate vendors we provide a spec that V-0
material is required and a UL V-0 stamp be placed on the board.
The question is, how
In a message dated 6/19/2003 2:04:28 PM Eastern Standard Time,
peter.tar...@sanmina-sci.com writes:
Greg -
My recollection of the FUS Procedures is that they checked
the laminate's manufacturer and type designation, but not
necessarily the flammability classification. Did that
change
]
Sent: Thursday, June 19, 2003 12:48 PM
To: EMC-PSTC (E-mail)
Subject: PCB marked for UL 94V-0
Hello group,
An interesting question came up about validating printed circuit board raw
material. In searching for alternate vendors we provide a spec that V-0
material is required and a UL V-0 stamp
Hi Doug:
The question is, how do I independently validate the material used, since a
vendor could theoretically choose whatever they want and stamp it as V-0?
I interpret your question as to how to determine
whether or not a PCB is counterfeit or not.
A UL-certified PCB would have
: RE: PCB marked for UL 94V-0
Doug -
Chances are very good, if the finished board is V-0, the
base laminate would also be capable of V-0, even if not
separately tested. The converse is not necessarily true.
I've seen V-0 laminates not comply with V-2 requirements
after particularly harsh
Got it now:
http://www.portplastics.com/plastics/techSpecs/index.html
and hit UL Test Procedures
Dave Cuthbert
From: drcuthbert
Sent: Thursday, June 19, 2003 2:05 PM
To: 'Peter L. Tarver'; EMC-PSTC (E-mail)
Cc: POWELL, DOUG
Subject: RE: PCB marked for UL 94V-0
94V test procedure
-sci.com
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On
Behalf Of POWELL, DOUG
Sent: Thursday, June 19, 2003 9:48 AM
To: EMC-PSTC (E-mail)
Subject: PCB marked for UL 94V-0
Hello group,
An interesting question came up about
Greg -
My recollection of the FUS Procedures is that they checked
the laminate's manufacturer and type designation, but not
necessarily the flammability classification. Did that
change before you left UL?
I note that the QMTS2 Guide Card only requires
manufacturer's name and type designation.
Doug,
In researching the book that I am writing for Kluwer, Robust Electronic
Design Reference, I ran across the following booklet:
Lund, Preben, How to Design Printed Circuit Boards for UL
Recognition. Westlake Village, CA: Bishop Graphics, 1983.
In my manuscript, I discuss UL
, mailto:doug.pow...@aei.com DOUG
To: EMC-PSTC (E-mail) mailto:emc-p...@ieee.org
Sent: Thursday, June 19, 2003 11:47 AM
Subject: PCB marked for UL 94V-0
Hello group,
An interesting question came up about validating printed circuit board raw
material. In searching for alternate vendors we provide a spec
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