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RoHS-5 and Johanson MLCCs
Ahmet Akman, Applications Engineer
April 24, 2006 |
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic
Equipment Regulations (“The RoHS Directive”) limits the use of six substances within
the structure of the end-user electrical and electronic equipment. These six substances
consist of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl
(PBB) and polybrominated diphenyl ether (PBDE) flame retardants and known to be
harmful to human health and the environment. One of the major concerns of the
manufacturers in the electronics industry facing is the application of lead in the
production of components and circuit board assemblies.
The RoHS Directive covers the equipment used for servers, storage, storage array, and
telecommunications infrastructure (switching, routers and gateways) but also exempts the
use lead in solder (the limits for the other 5 substances must still be in compliance). This
exemption has been introduced to the industry to allow lead in solders for professional,
high reliability applications where efficient lead-free substitutes have not been identified.
This category is informally referred as RoHS-5 by the telecommunication industry and
same component manufacturers.
With the introduction of RoHS-5 concept, the original RoHS Directives that control 6
substances is started to be referred as RoHS-6 in everyday practice.
Johanson Dielectrics multilayer capacitors have 100% Tin termination (V termination
code in the part number), could be either RoHS Compliant (RoHS-6) or RoHS Non-
Compliant. Since there isn’t any lead content in the termination, RoHS-5 exemptions do
not apply.
Johanson Dielectrics ceramic capacitors that could be considered as RoHS-5 are the chips
that have Lead (Pb) content in their terminations like SnPb termination (T code) or Solder
dip (W code). There parts would be RoHS-5 Compliant to be used in servers, storage,
storage array, and telecommunications infrastructure (switching, routers and gateways)
applications. |
| Notice: Specifications are subject to change without notice. Contact your nearest Johanson Dielectrics
Sales Office for the latest specifications. All statements, information and data given herein are believed
to be accurate and reliable, but are presented without guarantee, warranty, or responsibility of any kind,
expressed or implied. Statements or suggestions concerning possible use of our products are made
without representation or warranty that any such use is free of patent infringement and are not
recommendations to infringe any patents. The user should not assume that all safety measures are
indicated or that other measures may not be required. Specifications are typical and may not apply to all
applications. |
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