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Restriction of Certain Hazardous Substances (RoHS)

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Restriction of Certain Hazardous Substances (RoHS) . Restriction of Certain Hazardous Substances (RoHS) . Directive reference : 2002/95/EC. Member states shall ensure that from 1 st July 2006, new EEE put on the EU market does not contain 6 restricted substances.

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Restriction of Certain Hazardous Substances (RoHS)

Directive reference : 2002/95/EC

Member states shall ensure that from 1st July 2006, new EEE put on the EU market does not contain 6 restricted substances

Article 4.1 of RoHS directive states the following 6 substances

  • Lead (Pb)
  • Cadmium ( Cd)
  • Mercury(Hg)
  • Hexavalent Chromium ( Cr6)
  • Polybrominated Biphenyles ( PBB)
  • Polybrominated Diphenyle Ether ( PBDE)
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Restriction of Certain Hazardous Substances (RoHS)

Where these substances are used ?? Some examples…

  • Lead is used in almost all solder joint & lead finish.
  • Cadmium is used in cable sheathing as anti corrosive agent for protecting connectors & fixing in salt spray conditions.
  • Mercury is used in thermostats, sensors & various forms of energy saving lamps
  • Hexavalent chromium is used in metal coatings for corrosion protection and wear resistance
  • PBB & PBDE are fire retardant materials and added to PCB, connectors, Plastics etc.
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Restriction of Certain Hazardous Substances (RoHS)

  • As per the directive prohibition of other hazardous substances shall be decided as soon as scientific advice is available
  • Directive is applicable to WEEE falling under categories 1,2,3,4,5,6,7 & 10 of annex 1A of WEEE directive.
  • 8 & 9 will have delayed start.
  • RoHS directive does not apply to spare parts for the repair or reuse of EEE put on the market before 1st Jul 2006
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Restriction of Certain Hazardous Substances (RoHS)

Are there any limits for the substances ?

  • For the purpose of RoHS regulations, a maximum concentration value of up to 0.1% by weight in homogeneous materials for Lead, Mercury, Hexavalent Cr, PBB, PBDE and up to 0.01% by weight in homogeneous materials for Cadmium will be permitted in the manufacture of EEE ( DTI, UK )
  • Lead (Pb) 1000 ppm
  • Cadmium ( Cd) 100 ppm
  • Mercury(Hg) 1000 ppm
  • Hexavalent Chromium ( Cr6) 1000 ppm
  • Polybrominated Biphenyles ( PBB) 1000 ppm
  • PolybrominatedDiphenyle Ether ( PBDE) 1000 ppm
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Restriction of Certain Hazardous Substances (RoHS)

Where to look for these substances ?

  • All homogeneous components within the product need to conform to the maximum concentration limits by July 1 2006

What is homogeneous material ?

  • Materials that can not be disjoined into different materials.
  • Mechanically disjoined means, material that can be separated by mechanical actions such as unscrewing, cutting, crushing, grinding & abrasive process
  • Understood as uniform composition throughout – like plastic, ceramics, metals, alloys, etc.
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Restriction of Certain Hazardous Substances (RoHS)

Who is responsible ?

 Producer

  • Produces are required to keep appropriate records for a period up to 4 years after the use.

Who is a producer ?

  • Any person / company who irrespective of selling technique used,
  • Manufactures & sells EEE under his own brand
  • Resells under their own brand, equipment produced by other suppliers
  • Imports or exports electrical & electronic equipment on a professional basis into member states.
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Restriction of Certain Hazardous Substances (RoHS)

How this will be enforced ?

  • Test purchases are made in the market
  • Will be tested for restricted substances
  • Compliance documents will be requested
  • issue non compliance notice / ask for actions taken

What is the major impact on business ?

  • EOL – end of life for parts, products have seen a steady upward trend in recent past & is expected to grow at faster rate.
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Restriction of Certain Hazardous Substances (RoHS)

What we need to do ?

  • Even though Medical devices have a late start,
  • Identify restricted substances in homogeneous materials, get the test reports, verify & document the same.
  • Look for alternate materials / process where ever restricted substances exceed the limits, also where ever EOL is announced,
  • PWA soldering process, where, in absence of Pb, soldering temp. goes up, we need to look at the machine, temp. profile, component ratings.