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Article Highlights:
The RoHS directive restricts ten substances in electrical and electronic equipment: lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and, since Delegated Directive 2015/863 took effect in July 2019, four phthalates (DEHP, BBP, DBP, and DIBP).
RoHS 2011 65 has been in force for well over a decade, yet the process of proving compliance still looks remarkably manual at most companies. Someone opens a browser, searches the manufacturer part number plus "RoHS certificate," clicks through multiple distributor pages, and hopes the PDF they find is credible and recent enough to hold up to any potential regulatory scrutiny.
Solving the CoC problem means shifting from reactive retrieval to continuous, centralized data.
Ask any hardware engineer what slows down the release of a new product, and the answer often isn't what are seemingly the most likely culprits—simulation, layout, testing. Instead, for many engineers, the most significant bottleneck is compliance paperwork.
Specifically, it's the search for a current certificate of compliance for every part number on their bill of materials (BOM). RoHS 2011 65, formally Directive 2011/65/EU, has been in force for well over a decade, yet the process of proving that each component is compliant with the regulation still looks remarkably manual at most companies. Someone opens a browser, searches the manufacturer part number plus "RoHS certificate," clicks through multiple distributor pages, and hopes the PDF they find is credible and recent enough to hold up to any potential regulatory scrutiny.
This kind of haphazard approach may work well enough when a product has fifty parts. It works significantly less well, however, for a BOM with eight hundred line items, multiple approved sources per position, and a compliance team that needs the documentation before the product ships to the EU.
What RoHS 2011 65 Requires
The RoHS directive restricts ten substances in electrical and electronic equipment: lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and, since Delegated Directive 2015/863 took effect in July 2019, four phthalates (DEHP, BBP, DBP, and DIBP). Each of these substances has a maximum concentration of 0.1% by weight in homogeneous materials, except cadmium, which is capped at 0.01%.
The obligation to demonstrate conformity rests with the manufacturer placing the product on the market. Under RoHS 2011 65, that means drawing up technical documentation, issuing an EU Declaration of Conformity, affixing the CE mark, and keeping that documentation available for ten years after the product is placed on the market. Market surveillance authorities can request it at any time.
In practice, the technical file for a finished product rests on component-level evidence. For most OEMs, that evidence is a collection of supplier certificates of compliance, material declarations, and in some cases full material disclosures or test reports. The EU harmonized standard EN IEC 63000 explicitly recognizes supplier declarations as a valid basis for the technical documentation, provided the manufacturer assesses their reliability. But that last clause matters more than most teams realize.
The Neverending Hunt for Certificates of Compliance
The core issue engineers and compliance professionals face when working to adhere to RoHS is that compliance documentation for the EU directive is scattered, inconsistent, and vulnerable to becoming outdated.
Scattered
Every manufacturer publishes certificates differently. Some host a searchable compliance portal. Some bury PDFs in product family pages. Some only provide documentation by request through a sales representative or a support ticket. And while distributors sometimes mirror these files, it’s often with minimal indication of when the documentation was last updated.
Inconsistent
A certificate from one supplier may cite Directive 2011/65/EU alone, while another references 2011/65/EU as amended by 2015/863. One lists exemptions by Annex III number, and a second says "compliant with exemptions" without further elaboration. Some cover a single part number, others an entire product series. Engineers and compliance experts have to read each one closely to know what it actually attests to—a massive undertaking when it’s being done for hundreds of parts in a BOM.
Obsolete
This is the part that blindsides teams during audits. A certificate issued before 2019 that only addresses the original six substances does not cover the phthalates. A certificate relying on an Annex III exemption may be undermined when that exemption expires or is narrowed, as several exemptions have been revised or permitted to lapse in recent review cycles. A document that was perfectly valid when it was originally downloaded can become outdated within a year or two, often without anyone at the company noticing until the stakes are high and time is short.
Multiply these three problems across hundreds of part numbers, and you get a familiar pattern: compliance data that is mostly complete, largely but not entirely current, and very difficult to verify in a pinch when a customer or regulator asks for it.
The Cost of Treating RoHS as a One-Time Task
Many organizations treat RoHS documentation as a final box to check off immediately prior to design release. Collect the certificates, file them in a shared drive, move on. The problem with that strategy, though, is that RoHS 2011 65 compliance is not static, and neither are most businesses’ suppliers.
For many original equipment manufacturers (OEMs), parts get reformulated, manufacturers get acquired, and certificate formats change along with the parent company's templates. A part goes end-of-life, and the replacement has a different material composition. Procurement qualifies a second source that nobody sent through compliance review. Each of these events can quietly break the link between the product's Declaration of Conformity and the evidence underneath it.
The consequences of a last-minute approach to obtaining RoHS COCs show up in a few specific places. Engineering hours get spent on document retrieval rather than design. Product launches may be stalled or delayed, as the company waits on a handful of missing certificates. Customer compliance requests, which are increasingly common from large OEMs and contract manufacturers, turn into crises that consume multiple days and potentially erode confidence.
In the worst-case scenarios, a product ships with a technical file that can’t actually support its CE marking.
What a Permanent Solution Looks Like
Solving the CoC problem means shifting from reactive retrieval to continuous, centralized data. A durable RoHS compliance process usually has four characteristics.
Certificates are collected at the part-number level, rather than on a project-to-project basis. A certificate for a given MPN should be retrieved once and reused across every BOM that contains it—rather than forcing different engineers to locate it anew for each new product and program.
Documents are linked to structured data. A PDF sitting in a folder tells you nothing until someone opens it. A more useful data repository is a record that states the part's RoHS status, the directive version it references, any exemptions claimed, and the date of the underlying document.
Changes are monitored. When a manufacturer issues a new certificate, a product change notification (PCN), or an end-of-life notice, the compliance record should be updated and the affected BOMs should be flagged.
Coverage is visible. At any moment, your engineering team should be able to see which parts on a BOM currently have CoC documentation, which rely on temporary exemptions, and which have gaps that require supplier outreach.
Building a compliance program that features these four characteristics is not particularly onerous from a conceptual standpoint. What makes it hard is the volume of source material and the effort required to keep all that documentation current. But that’s exactly where purpose-built compliance software thrives.
The Best Compliance Software Collects Certificates for You
There’s a meaningful difference between compliance tools that store the certificates organizations upload and compliance tools that go out and gather them. The first category provides some value in terms of serving as a permanent data repository that professionals can consistently draw from. The second option, however, fulfills that function while also removing the laborious, time-consuming search for compliance documentation.
The strongest platforms continuously collect publicly available certificates of compliance—including RoHS CoCs—directly from manufacturers and aggregate them for millions of part numbers in a single centralized location. Instead of an engineer searching the web for each MPN, the certificate is already attached to the part record, along with the compliance status, directive references, and exemptions claimed. When a supplier publishes an updated document, the platform picks it up.
For teams managing RoHS 2011 65 obligations across large portfolios, this changes the workflow in a fundamental way. Uploading a BOM returns compliance status and source documentation for every line item that has public data, while highlighting the compliance gaps that require direct supplier contact. With these capabilities at their disposal, engineers stop being researchers and go back to being sophisticated reviewers, the part of the job that actually requires their expertise and professional judgment.
Compliance tool Z2 was built with this approach in mind. The platform collects and maintains certificates of compliance for RoHS, REACH, conflict minerals, and other regulatory documentation for millions of components, pairing each certificate with structured compliance data so teams can assess an entire BOM in minutes, rather than spending days or weeks striving to gather all the necessary compliance certificates. By utilizing Z2’s compliance documentation, teams don’t have to squander hours or days googling MPNs and scouring the internet for obscure PDFs. And if there’s a specific CoC that Z2 doesn’t have, a team of compliance professionals can campaign suppliers to obtain it.
To learn about how Z2 can help engineers and compliance experts consistently obtain RoHS certificates of compliance in a single, centralized location, schedule a free trial with one of our product experts.
