What does RoHS stand for again? A summary

Prize question: Why is July 22, 2019 so special? Unless you’re a subject expert, it probably won’t mean a thing to you. But, on this day the latest revision of the 2015 RoHS Directive (Restriction of Hazardous Substances, RoHS III or RoHS 3) came into force. Our colleagues at Würth Elektronik will not have paid much attention to this date either – because the company has already been complying with this third revision of the directive for years. The latest revision restricts the use of four additional substances:

  • Bis(2-Ethylhexyl) phthalate (DEHP)
  • Benzyl butyl phthalate (BBP)
  • Dibutyl phthalate (DBP)
  • Diisobutyl phthalate (DIBP)

These plasticizers were added to the RoHS directive in 2015. Since July 22, 2019, devices in the categories 1 to 7, 10 and 11 may only use these plasticizers to a maximum of 0.1% of the homogeneous material (maximum concentration value of 0.1%).

Background information to the RoHS directive

RoHS is an EU directive that restricts the use of certain hazardous substances in electrical and electronic equipment. It regulates the use and distribution of hazardous substances in electrical equipment and electronic components. The restriction pertains to every single homogeneous material of the device – for example, plastic housing is included as well. Companies that import or sell such devices within the EU are directly affected by the directive because they are obliged to ensure compliance. Some substances used in electrical engineering are classified as environmentally hazardous. They may be toxic in certain quantities or the environment might not be able to break them down or is only able to break them down with difficulties. The RoHS directive intends to minimize the entry of these substances into the environment.

Best-known example: Leaded soldering of electronic components had to be replaced with lead-free soldering. The implementation of the RoHS directive requires a transformation of many common production processes. Today, tin-silver, tin-copper and tin-bismuth are just a few materials used as a replacement for leaded alloys.

Would you like to find out more? Please read our RoHS FAQ.

Figure 1 RoHS statement on the packaging label

How do you know which products are compliant?

All our products are RoHS-compliant. They are marked with a green label showing “Compliant RoHS&REACH” next to a green tick on the packaging label.

Figure 2 Material Compliance statements in the datasheet

Additional icons in the datasheets also confirm compliance.

Certificate of conformity and research regarding exceptions

Many companies require an additional written RoHS III certificate of conformity. This document certifies that all manufactured components and all homogeneous subcomponent parts comply with the directive 2011/65/EU and the supplement 2015/863 of the European Parliament for the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS III directive).

According to this directive, there are exceptions for the restricted substances for specific uses. Please read this document to learn which substances in particular are covered and which products use an exemption of the RoHS directive.

You will find all important documents about material quality and compliance here.

So you see, much is already being done in the area of material compliance, which is important and necessary to avoid harming the environment with hazardous substances.

Authors: Michael Weser, Total Quality Manager; Nina Heuser, Marketing Manager

Nice post author.Thank you.

Please visit - https://thecompucare.in/main/index.php

Tamal Ghosh


great explanation, if add an example of selecting a ferriet with some values, will be more helpful for students and beginers.


If the sensitive parts and wires are not separated properly, it might lead to troubleshooting and noise issues. No matter what kind of electronic equipment you are dealing with, it is essential to ensure safety in that field. Thanks a lot!

100-120 VAC INPUT Variable frequency drives

What is your opinion?

Start a discussion on this topic or leave a comment.
We appreciate your input.

Please note: For editorial reasons, your comment will appear on the website with a time delay.

We reserve the right to modify or delete any submitted comments if they do not comply with our guidelines. Please refer to the Blog Rules for further information.

Please read our privacy policy.