There is no way of telling - you will need to check the data sheet for
all switches and relays.
Search Google using: relay cadmium
For general info.
Regards,
Chris
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: 28 January 2005 18:01
To: [log in to unmask]
Subject: Re: [LF] RoHS, Lead-Free and North American regulatory
agencies?
OK, I guess I should ask, is it the norm for relays and switches to
contain
cadmium, or the exception? To date, I hadn't identified any switches,
etc
that we used, that contained banned substances, but I don't know if I
realized I needed to look for cadmium in switches. Also, I am just
starting
to try to identify all the parts in our database that may be affected.
You know how it is - an electrical person is well aware of the existence
of
lead in electronics, but when it comes to the chemical makeup of a
plastic,
or molding compound, or a metal corrosion resistant finish, it is harder
to
keep up to date on all the finicky details of flame retardents or
hexavalent
chromium or cadmium, etc ad nauseum.
For example, I have already learned recently, by doing a detailed BOM
analysis on just one of the dozens of products we make, that over 95% of
the
caps in our database have already been converted to leadfree without our
even noticing. That came as a bit of a shock. But that product doesn't
use
any switches or relays so I haven't examined that area of our database
in
any detail yet.
So...switches/relays - can anyone who is further along in their database
analysis fill me in? What should I expect to find?
-----Original Message-----
From: James, Chris [mailto:[log in to unmask]]
Sent: January 28, 2005 11:27 AM
To: (Leadfree Electronics Assembly Forum); Genny Gibbard;
[log in to unmask]
Subject: RE: [LF] RoHS, Lead-Free and North American regulatory
agencies?
it just says electrical contacts, so relays, switches etc. - read the
Tac10
unofficial note from Dec2004 along with the draft regs which is all
available on the DTi sustainability website.
<http://www.dti.gov.uk/sustainability/weee>
http://www.dti.gov.uk/sustainability/weee
the tac10 note is at:
http://www.dti.gov.uk/sustainability/weee/TAC_10_December.pdf
<http://www.dti.gov.uk/sustainability/weee/TAC_10_December.pdf>
the draft regs:
http://www.dti.gov.uk/sustainability/weee/RoHs_Regs_draft.pdf
<http://www.dti.gov.uk/sustainability/weee/RoHs_Regs_draft.pdf>
-----Original Message-----
From: Leadfree on behalf of Genny Gibbard
Sent: Fri 28/01/2005 16:06
To: [log in to unmask]
Cc:
Subject: Re: [LF] RoHS, Lead-Free and North American regulatory
agencies?
I'm not sure I understand when one would be using or what type of part
would
contain an exempt cadmium contact.
Could someone just post a sample manufacturer part number that would
fall
into the exemption, so I could figure out if we currently employ any of
those type of parts?
Thanks.
-----Original Message-----
From: Chris Robertson [ mailto:[log in to unmask]
<mailto:[log in to unmask]> ]
Sent: January 28, 2005 9:56 AM
To: [log in to unmask]
Subject: Re: [LF] RoHS, Lead-Free and North American regulatory
agencies?
Dear All
See below comments on cadmium containing contacts from my colleague Paul
Goodman
Chris
Tel: +44 (0)1372 36 7204
<><
========================================================================
Hi,
The very confusing issue of cadmium in contacts has now been resolved.
A little history first....
Cadmium plating was listed as an exemption in the original RoHS
directive.
It was not clear that electric contacts based on silver/cadmium oxide
were
intended to be included in this exemption and without further
clarification, it would have been safer to assume they were not.
Directive
91/338 implied cadmium metal contacts only.
I had several discussions with DTI, the EC and some electric contact
manufacturers and users and it was clear that there are no suitable
alternatives for these contacts in certain applications. An exemption
for
them was therefore justified. As a result, when the new exemptions
reviewed
by ERA were added to the list in the RoHS directive annex, cadmium oxide
electric contacts were also added and so are now exempt. (the wording of
the high melting point solder exemption was also clarified to include
all
solders with >85% lead).
Note that the exemptions in the DTI's proposed guidance to the UK RoHS
regulations are now out of date and the legislation will have to include
the recent amendment.
Hope this helps,
Best regards,
Paul Goodman
ERA Technology
========================================================================
=
On Mon, 24 Jan 2005 16:18:57 -0500, Davy, Gordon <[log in to unmask]>
wrote:
>Camille Good has posted an interesting discussion of the RoHS-awareness
of
product safety organizations UL and CSA. I was particularly glad to read
about the prohibited flame retardants in ABS, a kind of plastic used for
making housings for electronic products, as I had not seen info on the
extent to which PBBs and PBDEs are used in our industry. (I wish that
more
discussion of this topic would appear in the Halogenfree forum.) She
concludes with a question. I can't contribute to that, but I would like
to
comment on a topic she touched on - cadmium used as an electrical
contact..
>
>In her posting, Camille referred to the disappearance of cadmium
contacts
from RoHS-compliant products. This is a topic that was discussed quite a
few months ago in this forum, including by Nick Jolly, then of the UK's
Department of Trade and Industry. The latest information from DTI
appears
in its guidance document, dated July 2004, on implementation of its
regulations implementing the RoHS directive. It is available at
< http://www.dti.gov.uk/sustainability/weee/RoHS_Regs_Draft_Guidance.pdf
<http://www.dti.gov.uk/sustainability/weee/RoHS_Regs_Draft_Guidance.pdf>
>
http://www.dti.gov.uk/sustainability/weee/RoHS_Regs_Draft_Guidance.pdf
<http://www.dti.gov.uk/sustainability/weee/RoHS_Regs_Draft_Guidance.pdf>
..
>
>At the end of that guidance document is Annex C, which provides quite
valuable "Guidance on the specific applications of mercury, lead,
cadmium
and hexavalent chromium set out in Schedule 2 of the RoHS Regulations,
which are exempt from its requirements." In that annex is a discussion
of
cadmium, which reads:<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-
com:office:office" />
>
>11. Cadmium plating except for applications banned under Directive
91/338/EEC (OJ No. L 186, 12 July 1991, p. 59) amending Directive
76/769/EEC (OJ No. L262, 27 September 1976, p. 201) relating to
restrictions on the marketing and use of certain dangerous substances
and
preparations.
>
>Directive 91/338/EEC amending Directive 76/769/EEC relating to
restrictions on the marketing and use of certain dangerous substances
and
preparations, gives the following definition of cadmium plating: "Within
the meaning of this Directive, 'cadmium plating' means any deposit or
coating of metallic cadmium on a metallic surface." This definition is
seen
as applying for the purpose of the RoHS Regulations. [Note that the
cadmium
does not need to have been deposited by a chemical plating process to
qualify for this definition.]
>
>Subsequently, the Marketing and Use Directive (as amended) bans the use
of
cadmium plating in a variety of product sectors. However, that Directive
allows the use of cadmium plating for "electrical contacts in any sector
of
use, on account of the reliability required of the apparatus on which
they
are installed." As a result, in this context cadmium plating is
prohibited
for products manufactured in the household goods and central heating and
air conditioning plant sectors. However, it is viewed as being permitted
for electrical contacts in all the WEEE categories to which the RoHS
Regulations apply.
>
>I take it that in the UK at least, the use of cadmium for electrical
contacts is regarded as permitted by the RoHS directive. Since no other
country seems to have issued a contrary interpretation, I think that a
good
case could be made for not abandoning cadmium contacts where it is of
benefit to the application.
>
>
>Gordon Davy
>Baltimore, MD
>[log in to unmask]
>410-993-7399
>
>
>
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