Prokit's Industries has already successfully introduced RoHS compliant products into the market and we are working on gradually replacing components containing lead or other restricted substances in all of our product lines.
Thanks to our many years of process experience and longstanding international partnerships, we are able to ensure the reliability of our components in respect of their compliance in accordance with the requirements of RoHS, WEEE and lead free standard. We are working on cost-effective lead-free production techniques that secure Prokit's high product quality.
Restriction Of Hazardous Substances in Electrical and Electronic Equipment
Many chemical substances added to the material to enhance product functionality have been proven to be dangerous to the environment and human health. To minimize the environmental impact, EU member states have introduced new legislation known as RoHS, which will both ban the use of lead and some other substances in electrical and electronic products.
EU Directive restricts the use of 6 hazardous materials in the production of various types of electronic & electrical equipment. It is one of a series of EU environmental Directives and is closely linked with the WEEE Directive.
Prescribed maximum concentration levels of restricted substances (except exempted materials)
By weight of homogeneous material
0.1% or 1000ppm
0.1% or 1000ppm
0.1% or 100ppm
Hexavalent chromium (CrVI)
0.01% or 1000ppm
|Polybrominated biphenyls (PBB)
||0.1% or 1000ppm
|Polybrominated diphenyl ethers (PBDE)
||0.1% or 1000ppm
Waste Electrical and Electronic Equipment
It is an initiative of the European Union to preserve, protect and improve the quality of the environment, protect human health and utilize natural resources prudently and rationally. EU aims to place waste electrical and electronic equipment (WEEE) as one of the target areas to be regulated, in view of the application of the principles of prevention, recovery and safe disposal of waste.
Products shall be marked with:
‧The crossed wheelie bin symbol
‧In exceptional cases (e.g. where necessary due to the size or function of the product) the symbol shall be
printed on the packaging, instructions for use and warranty;
‧A mark clearly indicating that they were placed on the market after 13 August 2005. (New European
standards will be developed for this purpose).
"Producers", or third parties acting on their behalf, shall establish systems for the recovery or recycling of WEEE and meet targets for the rates of recovery (70 to 80%) and recycling (50 to 75%) based on the average weight per appliance for each category of WEEE.
These targets apply overall within each Member State, but nevertheless highlight the minimum rates that producers should aim for, contributing towards the national obligations.
The RoHS logo
In order to enable our customers and users to identify Pro'sKit RoHS compliant products as simply as possible, we have introduced our own logo. Once we have checked that a product conforms to RoHS 2002/95/EC, the logo will be used on the packaging.
Frequently Asked Questions
Do I need to get my products tested for RoHS compliance?
If you are an assembler of OEM or CEM PCBs, a European manufacturer selling within the EU, or an importer of manufactured product into the EU, you must be able to demonstrate compliance with the Restriction of Hazardous Substances (RoHS) Directive (2002/95/EC) when your finished product is put on the market in the EU.
Which substances are restricted?
Electronic and electrical equipment must not contain more than the maximum permitted levels of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs).
What is the deadline for compliance?
‧The requirements of the RoHS Directive come into force on 1st July 2006. Products put on the market after
this date will be required to be compliant.
‧RoHS does not apply to any products that are already "on the market" (already in the supply chain) in the
EU prior to this date; they can continue to be sold.
‧WEEE: By 13 August 2005, products "put on the market"after this date should be marked with the
crossed-out wheelie bin to identify these products cannot be processed with the regular refuse.
What are the implications if my product doesn't comply by then?
An enforcement authority may ask to see evidence that a producer has used due diligence and taken reasonable steps to comply with the requirements of the RoHS Directive. Failure to comply could result in the eventual withdrawal of your product from the market.
How can I find out whether my product complies?
If materials declarations or certificates of compliance for each component of your product are not available from your suppliers, or if you have any doubts over the accuracy or completeness of that information, it is advisable to subject your product to a screening test, which measures the concentration of the restricted substances within it.
Does the same apply to packaging materials?
‧EU's 94/62/EEC Directive requires the content of lead, cadmium, mercury, hexavalent
‧For glass and ceramic packaging material, cadmium content cannot exceed 1 ppm, hexavalent chromium
and mercury cannot exceed 5ppm.
What's the difference between "green" and "RoHS"?
The definition of "green" is not currently defined by any legislative mandates or industry standard organizations; therefore the term "green" is being used somewhat loosely. The diagram below provides Pro'sKit definition of the differences. Pro'sKit support product options that are lead-free and RoHS compliant. We are monitoring legislative and industry standardization groups closely on the agreed upon definition of "green" and will ensure product compliance accordingly.
What problems are there for using Lead-free solder?
‧Higher melting point of Lead-free solder may cause physical and thermal damage to components and PCB.
‧Lead-free solder has poor wetting ability and therefore needs a more active (corrosive)
‧Flux to improve wetting.
‧Lead-free solder joints need longer time to solidify.
‧The solder point will appear dull in color.
‧The high tin content of Lead-free solder will shorten life time of the soldering tips.
How to cope with the above problems?
‧Do not try to increase the temperature of the soldering tip to accommodate for higher melting point,
because this will cause more damage to components and PCB.
‧Also, higher temperature will only make soldering of Lead-free solder even more difficult
oxidation will form causing even worse wetting.
‧Keep using the same temperature as normal with tin/lead solder.
‧Instead, choose the largest soldering tip possible for the joint, and use a high power soldering iron.
‧This way, the larger tip (with larger volume mass) has better heat retention and the fast
thermal recovery of
the tip will help smooth out the Lead-free soldering process.
Why does Lead-free solder shorten life time of soldering tips?
‧Tin itself is a very active metal.
‧Tin reacts with the iron (Fe) layer of soldering tips and the iron layer is eroded away.
‧The higher the temperature, the faster the erosion speed.
‧With almost all Lead-free solder, the percentage of tin is over 90%.
‧Since there is higher tin content, with higher temperature and presence of more active flux, the erosion of
soldering tips occurs faster than regular tin/lead solder.
How should we care for the soldering tip to extend the life?
‧ Keep the tip the cleanest possible during use.
‧ Always TIN the tip before putting the soldering iron back in the holder.
‧ If you are not using the soldering iron for a while, e.g. over 10 minutes, turn off the soldering iron.
‧ Use the lowest possible soldering temperature.
What kinds of RoHS certificates are available?
The RoHS certification program has 3 different classes of certificates:
‧ROHS-1 complies with RoHS directive.
‧ROHS-2 complies with ROHS directive plus additional criteria which are more stringent than the RoHS
directive and includes requirements from an international company (for example Sony-00259)
‧ROHS-3 complies with JIG Guide. Joint Industry Guide (JIS) is a Guide which stipulates the hazardous
substances and is accepted by the different organizations as per EICTA (Europe), JGPSSI (Japan), EIA(USA) and JEDEC (USA).
Who should apply for RoHS certification?
The applicant must be either be the product manufacturer who owns the brand under which the product is distributed or the person who authorizes another original equipment manufacturer (OEM) to produce the product on their behalf.
At a first step, the certification firms will certify only homogenous material and electrical components.
Once certified, a commitment that the product sold on the market is identical with the certified product and is produced by same production process and same constituents is required.