Measures for environmental hazardous materials

Adjustment for hazardous materials (EU-RoHS and CHINA-RoHS)

Today, the disruption of the global environment has been taken up as a serious issue for human beings and a mission for its safeguard has become all the important. We, at KOA, started active management of chemical substances included in our products, and complied with EU RoHS Directive in July of 2006 and IT Products Pollution Control Act in the People’s Republic of China (Chinese RoHS) in March of 2007. “Regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals” has further been enforced in June of 2007 as a new chemical regulation in Europe. Social demand to environmental statutes is increasing like this, and we are actively addressing to the compliance with these laws and regulations.
In addition to the compliance, we are also advancing various activities such as halogen-free specifications to reduce hazardous substances and certification as a laboratory according to ISO/IEC 17025.

(1) What is EU-RoHS?

The Restriction of Hazardous Substances Directive (2002/95/EC), (RoHS), became effective on July 1 of 2006 requiring the usage of restriction of following six hazardous substances in the manufacture of electrical and electronic equipment placed on the market. This directive was amended on 8 June 2011, to Recast Directive 2011/65/EU of the European Parliament and of the Council. The original directive was expired as of 2nd Jan. 2013 and replaced by a new directive 2011/65/EU) on the following day. The restricted substances or maximum concentration value remain unchanged in RoHS 2 directive.

  • Lead (0.1wt%)
  • Mercury (0.1wt%)
  • Cadmium (0.01wt%)
  • Hexavalent Chromium (0.1wt%)
  • PBBs (Polybrominated biphenyls) (0.1wt%)
  • PBDEs (Polybrominated diphenyl ethers) (0.1wt%)

* The percentage in parentheses shows the maximum concentration value in the homogeneous material. The restriction of applications in the annex in the directive is exempted. KOA’s products applicable with this exemption to EU RoHS are as follows (as of July, 2016):

  • Copper alloy containing up to 4% lead by weight
  • Lead in high melting temperature type solders (i.e. lead-based alloys containing 85% by weight or more lead)
  • Electrical and electronic components containing lead in a glass or ceramic other than dielectric ceramic in capacitors, e.g. piezoelectronic devices, or in a glass or ceramic matrix compound.

To meet EU-RoHS, you need to choose lead (Pb) free material for termination surface material when our product has both type designation, leaded and lead free.
Please contact our sales representatives for details.

(2) Revised Chinese RoHS

Chinese RoHS became effective in March 2007 and the Revised Chinese RoHS was promulgated in January 2016 and became effective on July first 2016. However, the Compliance management catalogue of the second step (inclusion restriction) is not established at the present moment, so only the first step (obligation for applying identification) is valid. For each product, we disclose the content information of the six hazardous substances directed by Chinese RoHS. Please contact our sales representatives for details.

We use the codes of terminal surface material to identify products with Pb-free terminal and products with Pb terminal. See our typical type designations (*1).

Ex. 1

RK73B 2B T TD 102 J
Type Power Rating Terminal Surface Material Packaging Forming Nominal Resistance Resistance Tolerance
    T:Sn (Tin)
  3 digits  

Ex. 2

MF 1/4 D C T26 A 1002 F
Type Power Rating T.C.R. Terminal Surface Material F-Shape Packaging Forming Nominal Resistance Resistance Tolerance
4 digits

Ex. 3

CN 1J 4 T TD 103 J
Type Size Number of Resistors Terminal Surface Material Packaging Forming Nominal Resistance Resistance Tolerance
    T : Sn
(L : Sn/Pb)(3 digits)


“Regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals”(REACH) has been enforced on June 1 of 2007 in EU area. This regulation is aiming at safety evaluation and risk management of chemical substances, which are required to register according to the amount if used in businesses. Substance of Very High Concern (SVHC) must be registered if it is included in article. Information on such substances is also required through supply chain.

REACH ver.19

Download REACH Certification

(*1)Confirm on our products catalog for detail information.