RoHS compliant PCB assembly requires more than replacing leaded solder with a lead-free alloy. Compliance must cover restricted substances in components, PCB materials, solder, connectors, cables, coatings, adhesives, labels, and other homogeneous materials.
For products entering the European Union, the final equipment manufacturer must determine whether the product falls within RoHS scope. The manufacturer must also maintain suitable technical documentation and verify any claimed exemptions.
A PCB assembly factory supports this process through controlled sourcing, approved material declarations, lead-free production, lot traceability, process segregation, supplier records, and risk-based laboratory testing.
US buyers may also specify EU RoHS compliance, even when their products are not sold in Europe. This simplifies global distribution and supports customer environmental requirements.
What Is RoHS Compliant PCB Assembly?
RoHS compliant PCB assembly is the manufacturing of a printed circuit board assembly using materials that meet applicable restrictions on hazardous substances.
RoHS stands for Restriction of Hazardous Substances.
The European Commission explains that the RoHS Directive restricts hazardous substances in electrical and electronic equipment to protect public health and the environment.
For a PCBA, potential controlled materials include:
- Bare PCB laminate
- Copper plating
- Surface finish
- Solder mask
- Legend ink
- Solder paste
- Solder wire
- Electronic components
- Connector plastics
- Cable insulation
- Adhesives
- Conformal coating
- Potting compounds
- Labels
- Mechanical hardware
The compliance decision must consider the finished electronic equipment, not only the solder joints.
Is A PCBA An Electrical Product?
A PCBA may be a component installed inside another product or a complete functional electronic assembly.
Whether it independently falls within a legal product category depends on:
- Intended function
- How it is marketed
- Whether it is sold to end users
- Whether it needs additional assembly
- Applicable legislation
- Market destination
The final product manufacturer or importer should determine the legal scope with qualified compliance support.
Which Substances Does EU RoHS Restrict?
EU RoHS currently restricts ten substances in covered electrical and electronic equipment, subject to applicable exclusions and exemptions.
| Restricted Substance | Maximum Concentration In Homogeneous Material |
|---|---|
| Lead | 0.1% |
| Mercury | 0.1% |
| Cadmium | 0.01% |
| Hexavalent Chromium | 0.1% |
| Polybrominated Biphenyls | 0.1% |
| Polybrominated Diphenyl Ethers | 0.1% |
| DEHP | 0.1% |
| BBP | 0.1% |
| DBP | 0.1% |
| DIBP | 0.1% |
These limits generally apply by weight in each homogeneous material. They are not calculated as an average across the entire PCBA.
Lead
Lead may appear in:
- Solder
- Component terminations
- Ceramic materials
- Metal alloys
- Glass
- Certain electronic components
Lead-free soldering greatly reduces lead risk but does not address every possible material source.
Cadmium
Cadmium has a lower general maximum concentration than the other listed substances.
It may appear in certain:
- Pigments
- Platings
- Contacts
- Plastics
- Batteries
- Legacy components
Hexavalent Chromium
Hexavalent chromium may be associated with certain conversion coatings, plating processes, pigments, and corrosion-protection systems.
Testing total chromium alone does not prove whether the chromium is in the restricted hexavalent form.
PBB And PBDE
PBB and PBDE are brominated flame retardants.
They may be present in plastic materials, connector bodies, cable insulation, or older electronic materials.
A screening result showing bromine does not automatically prove that PBB or PBDE is present.
Restricted Phthalates
DEHP, BBP, DBP, and DIBP are commonly associated with plasticizing applications.
Potential risk areas include:
- Flexible cable insulation
- PVC materials
- Gaskets
- Soft plastics
- Adhesives
- Coatings
- Labels
What Is A Homogeneous Material?
A homogeneous material is a material with a uniform composition that cannot be mechanically separated into different materials.
A component may contain many homogeneous materials.
For example, a connector may include:
- Plastic housing
- Metal contacts
- Contact plating
- Solder coating
- Color pigment
Each material must meet the applicable concentration limit or qualify for a valid exemption.
Why Whole-Product Averages Are Misleading
Suppose a small plated contact contains a restricted substance above the permitted limit. The concentration cannot usually be diluted by averaging it with the weight of the entire circuit board.
Compliance assessment must consider the material where the substance exists.
RoHS 1, RoHS 2, And RoHS 3
These terms are widely used in the electronics industry, but buyers should understand what they mean.
RoHS 1
RoHS 1 commonly refers to the original Directive 2002/95/EC.
It introduced restrictions on six substances in electrical and electronic equipment.
RoHS 2
RoHS 2 commonly refers to Directive 2011/65/EU, which recast the earlier framework.
It introduced broader obligations involving conformity assessment, technical documentation, declarations, and CE marking for covered products.
RoHS 3
“RoHS 3” is a common commercial term rather than the official title of a separate directive.
It usually refers to RoHS 2 as amended by Delegated Directive (EU) 2015/863, which added four phthalates to Annex II.
Specify The Actual Requirement
Purchase orders should not state only “RoHS 3.”
A clearer requirement identifies:
- Applicable directive
- Amendments
- Product category
- Required exemptions
- Evidence format
- Testing requirements
- Market destination
Is Lead-Free PCB Assembly The Same As RoHS Compliance?
No. Lead-free and RoHS compliant are related but different claims.
What Lead-Free Usually Means
Lead-free assembly generally means that the solder alloy does not intentionally use lead as its main alloying element.
A common alloy is SAC305, containing tin, silver, and copper. Other lead-free alloys may also be used.
See Haode PCBA’s lead-free PCB assembly guide for process differences and material considerations.
Why Lead-Free Does Not Prove RoHS Compliance
A lead-free solder joint does not confirm the status of:
- Component plastics
- Connector housings
- Cable insulation
- Surface coatings
- Cadmium plating
- Brominated flame retardants
- Phthalates
- Hexavalent chromium
A RoHS Product May Use An Exempted Lead Application
Some RoHS exemptions permit restricted substances in defined applications.
Therefore, a product may be RoHS compliant under an exemption but not completely lead-free.
The compliance documentation should identify the applicable exemption rather than claiming that no lead exists anywhere.
Does RoHS Apply To A Bare PCB?
A bare PCB is usually supplied as a component for electrical or electronic equipment. Its materials can affect the finished product’s compliance.
Potential sources of restricted substances include:
- Base laminate
- Solder mask
- Legend ink
- Surface finish
- Plated layers
- Via-fill material
- Edge plating
- Carbon ink
- Peelable mask
- Metal-core materials
Request A Bare PCB Declaration
The PCB manufacturer should provide appropriate material or compliance documentation.
The record should identify:
- PCB specification
- Material supplier
- Surface finish
- Solder mask
- Legend ink
- Applicable RoHS version
- Declared exemptions
- Report date
- Authorized signatory
Match The Declaration To The Actual Board
A general factory certificate does not necessarily prove that the exact laminate, finish, and ink used on one order are compliant.
The evidence should connect to the actual material family or purchased product.
RoHS Compliance For Electronic Components
Each component should be evaluated using its exact manufacturer part number.
Manufacturer Part Number Matters
Two components with similar electrical specifications may have different:
- Terminal finishes
- Package materials
- RoHS status
- REACH status
- Exemptions
- Reflow ratings
- Environmental documentation
The PCB BOM should include complete manufacturer part numbers and approved alternatives.
Supplier Declaration
A useful declaration should identify:
- Manufacturer
- Part number or product family
- Applicable legislation
- Restricted-substance status
- Claimed exemptions
- Date
- Revision
- Authorized issuer
Distributor Information
Authorized distributors may provide supplier environmental documents.
However, a distributor’s general website statement should not replace the component manufacturer’s product-level evidence when detailed documentation is required.
Obsolete And Legacy Components
Older components may lack updated declarations.
The buyer may need to choose between:
- Additional laboratory testing
- Supplier clarification
- Approved exemption
- Alternative component
- Product redesign
RoHS Exemptions
RoHS includes exemptions for certain applications where substitution may be technically impractical or create greater risk.
Exemptions Are Application-Specific
An exemption may apply only to:
- One material
- One component type
- One product category
- One concentration range
- One defined technical application
A supplier cannot apply an exemption to every product simply because the restricted substance appears in the material.
Exemptions Can Change
Exemptions may be:
- Renewed
- Revised
- Narrowed
- Rejected
- Allowed to expire
- Different between product categories
The European Commission maintains information on RoHS implementation and exemption procedures.
Customer Responsibility
The final equipment manufacturer should confirm that an exemption applies to the intended product and market.
The PCBA supplier should record the exemption provided by the component manufacturer or customer.
RoHS Compliance For The European Union
Covered electrical and electronic equipment placed on the EU market must meet applicable RoHS requirements.
The responsible economic operator may need to address:
- Product scope
- Restricted substances
- Exemptions
- Conformity assessment
- Technical documentation
- EU Declaration of Conformity
- CE marking
- Record retention
- Market-surveillance requests
The PCBA Factory’s Role
A contract manufacturer can provide:
- Material declarations
- Supplier certificates
- Exact BOM records
- Production traceability
- Lead-free process control
- Test reports
- Change notifications
- Manufacturing records
The factory should not issue a finished-product EU Declaration of Conformity unless it is legally responsible for that product and has the required supporting evidence.
CE Marking
RoHS is one of the EU laws that may support CE marking for covered EEE.
A component PCBA does not automatically require its own CE mark when it is installed inside another finished product.
The final product may also need to comply with other applicable EU legislation.
RoHS Compliance For The United Kingdom
Great Britain has its own RoHS regulatory framework.
The UK government’s RoHS compliance guidance explains requirements for electrical and electronic equipment in Great Britain and Northern Ireland.
Great Britain
Products placed on the market in England, Scotland, and Wales should be assessed against the applicable UK RoHS Regulations 2012 as amended.
Northern Ireland
Northern Ireland may follow different market-access arrangements from Great Britain.
The responsible importer or manufacturer should verify current requirements for the exact destination.
Do Not Assume EU And UK Exemptions Are Identical Forever
EU and UK requirements may change on different schedules.
A declaration should identify whether it covers:
- EU RoHS
- UK RoHS
- Both frameworks
- A specific amendment or exemption
RoHS Expectations For US Buyers
The United States does not have one universal federal RoHS law covering all electronic products in the same way as the EU framework.
However, US buyers often request RoHS compliance because:
- Products may also be sold in Europe
- Global customers require it
- Retailers have restricted-substance policies
- State requirements may apply
- Corporate environmental programs require it
- One global BOM simplifies supply chains
Define The Market Destination
US buyers should inform the PCBA manufacturer whether the product will be sold in:
- United States only
- European Union
- United Kingdom
- Canada
- Australia
- Multiple global markets
The correct documentation depends on the destination and product category.
Contract Requirements Still Matter
Even when RoHS is not a direct legal requirement for a US-only product, it can become a contractual requirement through the purchase order.
The supplier must then meet the agreed specification.
RoHS Vs REACH
RoHS and REACH are separate EU regulatory frameworks.
| Comparison | RoHS | REACH |
|---|---|---|
| Main focus | Restricted substances in EEE | Chemicals, mixtures, articles and supply chains |
| Product scope | Electrical and electronic equipment | Broad range of substances and products |
| Substance list | Defined RoHS restricted substances | Candidate List, restrictions and other obligations |
| Concentration basis | Homogeneous material | Requirement-dependent |
| Main evidence | Technical documentation and conformity assessment | Supplier information, declarations and chemical data |
| List changes | Amendments and exemptions | Candidate List updates and restrictions |
REACH Candidate List
The ECHA Candidate List contains substances of very high concern.
Because the list changes, a declaration should include its issue date and the Candidate List version or update date used for assessment.
Article 33 Communication
Suppliers of articles containing a Candidate List substance above the relevant 0.1% weight-by-weight threshold may have communication obligations under REACH Article 33.
Complex products require careful assessment of how the threshold applies.
SCIP Database
Certain EU suppliers of articles containing Candidate List substances above 0.1% may also have SCIP notification obligations under the Waste Framework Directive.
A Chinese PCBA manufacturer may support the EU importer or product manufacturer with material information. The party placing the product on the EU market should determine its own notification obligations.
RoHS Vs WEEE
RoHS controls certain hazardous substances used in electrical and electronic equipment.
WEEE addresses the collection, recovery, recycling, and treatment of waste electrical and electronic equipment.
The European Commission’s WEEE overview explains the EU framework for electronic waste.
A Product May Need Both Assessments
A product can fall within both RoHS and WEEE obligations.
RoHS compliance does not automatically complete WEEE registration, labeling, reporting, or producer-responsibility requirements.
What Documents Support RoHS Compliance?
A RoHS certificate is only one part of the evidence.
A stronger technical file may contain several document types.
Supplier Declaration Of Conformity
The declaration should identify the exact material, component, or product family.
It should include:
- Supplier identity
- Part number
- Applicable RoHS requirements
- Exemptions
- Issue date
- Authorized approval
Full Material Declaration
A full material declaration provides detailed substance or material information.
It can support:
- RoHS assessment
- REACH assessment
- Customer-specific restrictions
- Future compliance reviews
Laboratory Test Report
A test report should identify:
- Sample
- Test method
- Laboratory
- Test date
- Restricted substances
- Measurement result
- Detection limit
- Conclusion
Certificate Of Conformity
A certificate of conformity may confirm that a shipped product meets stated requirements.
It should not be confused with a detailed chemical analysis report.
Production Records
Manufacturing evidence may include:
- BOM revision
- Bare PCB lot
- Component lots
- Solder-paste lot
- Solder-wire lot
- Process route
- Rework materials
- Shipment record
IEC 63000 Technical Documentation
IEC 63000 provides a framework for technical documentation used to assess electrical and electronic products against substance restrictions.
The official IEC 63000:2016+A1:2022 describes documentation that manufacturers compile when declaring compliance with applicable restricted-substance requirements.
Technical Documentation May Use Different Evidence
Depending on risk, the file may contain:
- Supplier declarations
- Contractual agreements
- Material declarations
- Certificates
- Test reports
- Supplier assessments
- Process controls
Not Every Component Needs Routine Laboratory Testing
Testing every material in every production lot would be expensive and may not be necessary.
A risk-based process considers:
- Supplier reliability
- Material risk
- Previous results
- Documentation quality
- Product changes
- Regulatory consequences
High-risk or poorly documented materials may require additional testing.
RoHS Laboratory Testing
Laboratory testing can verify selected materials, investigate uncertain documentation, or support supplier qualification.
XRF Screening
X-ray fluorescence can rapidly screen for elements such as:
- Lead
- Mercury
- Cadmium
- Total chromium
- Total bromine
The current IEC 62321-3-1:2026 describes XRF screening of several elements in uniform materials used in electrotechnical products.
XRF Limitations
XRF generally measures elemental content.
It may not directly distinguish:
- Hexavalent chromium from other chromium forms
- PBB from other brominated materials
- PBDE from other brominated materials
- Individual phthalates
- Specific chemical compounds
An inconclusive or high screening result may require more specific laboratory analysis.
Phthalate Testing
Phthalates usually require suitable chemical extraction and analytical methods.
IEC 62321-12 describes a GC-MS reference method for PBB, PBDE, and the four RoHS phthalates in polymers.
Sample Selection
The sample should represent the relevant homogeneous material.
Testing the complete assembled board as one mixed sample may hide a restricted concentration in one small material.
How A PCBA Factory Controls RoHS Materials
A reliable factory uses both documentation and production controls.
Approved Supplier List
Materials should come from approved manufacturers and controlled suppliers.
Approval may consider:
- Environmental documents
- Quality history
- Traceability
- Change notification
- Product authenticity
- Test results
Incoming Inspection
Incoming inspection may verify:
- Part number
- RoHS label
- Lot code
- Date code
- Supplier
- Packaging
- Required declarations
- Physical condition
BOM Validation
The manufacturing BOM should match the customer’s approved parts.
Unauthorized substitutions can change the compliance status.
Lot Traceability
The factory should connect actual material lots with the production order or board serial number when required.
Change Control
Any change to a component, PCB laminate, solder mask, finish, cable, coating, or adhesive may require renewed compliance review.
Lead-Free SMT Production Control
A lead-free process must control materials, tools, equipment, and rework.
Lead-Free Solder Paste
The solder paste record should identify:
- Manufacturer
- Product name
- Alloy
- Flux type
- Lot
- Expiration
- Storage condition
- Production use
Reflow Profile
Lead-free solder often requires a different thermal profile from traditional tin-lead solder.
The profile must account for:
- Paste requirements
- Component temperature ratings
- PCB thickness
- Thermal mass
- Moisture sensitivity
- Number of reflow cycles
Soldering Irons And Rework Tools
Lead-free and leaded materials should not be mixed unintentionally.
Factories may use:
- Dedicated soldering stations
- Identified tips
- Separate solder wire
- Controlled rework areas
- Clear material labels
- Operator training
Wave And Selective Soldering
Solder pots require alloy control and periodic analysis where appropriate.
Contamination can alter both alloy performance and compliance status.
RoHS Control During Rework
Rework can introduce an unapproved material after the main assembly has passed inspection.
Controlled Rework Materials
The factory should control:
- Solder wire
- Solder paste
- Flux
- Replacement components
- Cleaning chemicals
- Adhesives
- Coating materials
Replacement Component Compliance
A replacement part must have the same approved compliance status as the original or receive formal authorization.
Rework Traceability
The record should identify:
- Board serial number
- Defect
- Removed component
- Replacement part
- Replacement lot
- Rework material
- Operator
- Inspection
- Retest
Common RoHS Compliance Mistakes
RoHS problems often result from documentation and change-control gaps.
Treating Lead-Free As Complete RoHS Proof
Lead-free solder addresses only part of the restricted-substance risk.
Accepting A Generic Supplier Certificate
A declaration should connect to the exact component, material family, or delivered product.
Ignoring Cables And Connectors
Soft plastics and connector materials can contain phthalates or other restricted substances.
Using An Expired Exemption
Exemption status should be reviewed for the product category and market date.
Averaging The Whole Product
RoHS limits apply to homogeneous materials, not the average weight of the PCBA.
Allowing Unapproved Alternatives
A component substitution may change material composition, exemption use, or environmental documentation.
Depending Only On XRF
XRF is useful screening technology, but it cannot identify every restricted chemical form.
Forgetting Rework Materials
Lead-containing solder wire or an unapproved replacement component can compromise an otherwise compliant assembly.
Using An Undated REACH Declaration
The Candidate List changes. A declaration should identify the list date used for the assessment.
RoHS Requirements In The PCB Assembly RFQ
Buyers should include compliance requirements in the initial request for quotation.
Recommended RFQ Information
Provide:
- Final product application
- Target countries
- Applicable RoHS framework
- Required REACH declaration
- Product category
- Approved exemptions
- Required solder alloy
- Required test reports
- Required material declarations
- Traceability level
- Record-retention period
- Change-notification requirements
- Customer-specific restricted substances
Include Exact Manufacturer Part Numbers
Generic BOM descriptions make reliable material assessment difficult.
The PCB assembly file requirements guide explains why complete BOM and production data reduce sourcing and compliance risks.
Define The Meaning Of “RoHS Certificate”
The buyer should clarify whether it needs:
- Supplier declaration
- PCBA certificate
- Bare PCB report
- Component declarations
- Laboratory test report
- Full material declaration
- EU technical-file support
How RoHS Compliance Affects PCB Assembly Cost
RoHS-compliant production may require additional sourcing, documentation, testing, and process control.
Main Cost Factors
Cost may be affected by:
- Lead-free solder materials
- Approved component sources
- Environmental documentation
- Laboratory testing
- Material declarations
- Process segregation
- Alloy analysis
- Traceability
- Report preparation
- Customer audits
Small-Batch Orders
Prototype and low-volume projects may face higher document costs per board because compliance review is distributed across fewer units.
Special Testing
XRF screening or chemical laboratory testing may add:
- Sample preparation
- Laboratory fees
- Shipping
- Analysis time
- Material destruction
Buyers should include these requirements when requesting a PCB assembly cost quotation.
How Compliance Review Affects Lead Time
Environmental-document review can influence the project schedule.
Possible delays include:
- Missing supplier declarations
- Legacy component research
- Exemption verification
- Laboratory testing
- Alternative-part approval
- Bare PCB material confirmation
- Customer clarification
Stable parts and clear requirements reduce review time.
Compliance documentation should be included in the PCB assembly lead-time plan.
RoHS Requirements For Medical And Industrial PCBAs
Medical and industrial electronics often require both restricted-substance control and high reliability.
Medical Electronics
Some medical equipment is within RoHS scope, while specific exclusions or exemptions may apply depending on the product.
The manufacturer must confirm:
- Product category
- Intended use
- Market destination
- Applicable exemptions
- Technical documentation
- Quality-system requirements
Haode PCBA’s medical PCBA manufacturing guide covers additional quality and traceability considerations.
Industrial Electronics
Industrial control products may include:
- Power semiconductors
- High-temperature components
- Specialized solders
- Heavy-current connectors
- Long-life legacy parts
These applications may use exemptions that require careful technical and legal review.
How To Evaluate A RoHS PCB Assembly Manufacturer
A factory should demonstrate both document control and production control.
Recommended Supplier Questions
- Does the factory operate a controlled lead-free process?
- Which solder alloys are available?
- Are leaded and lead-free materials segregated?
- Are component manufacturer part numbers validated?
- Are RoHS declarations collected from suppliers?
- Does the bare PCB supplier provide material evidence?
- How are exemptions recorded?
- Can actual component lots be traced?
- Are rework materials controlled?
- Can the factory provide XRF screening?
- Which laboratory methods are available?
- How are component substitutions approved?
- How are regulatory changes monitored?
- Can the factory provide a PCBA compliance declaration?
- How long are records retained?
A supplier should also explain what it cannot legally certify without information about the final product.
Frequently Asked Questions About RoHS Compliant PCB Assembly
Does RoHS Mean Lead-Free?
Not exactly. RoHS restricts ten substances, while lead-free usually refers mainly to the solder alloy.
Is SAC305 Solder RoHS Compliant?
SAC305 is commonly used for RoHS-compliant soldering because it does not intentionally use lead as a main alloy element.
The complete PCBA still requires assessment of all relevant materials.
Does Every PCBA Need RoHS Compliance?
No. It depends on the product, market, customer contract, and applicable legislation.
Many global buyers specify RoHS even when the first sales market is outside Europe.
Can A PCBA Factory Issue A RoHS Certificate?
A factory can issue a declaration for the PCB assembly it manufactures based on supplier evidence, controlled materials, production records, and testing.
It normally cannot determine the finished product’s complete legal compliance without product-scope and application information.
Is RoHS Testing Required For Every Production Lot?
Not necessarily. A risk-based system may use supplier documentation, change control, traceability, audits, and periodic testing.
Customer contracts may require more frequent testing.
Does XRF Prove Full RoHS Compliance?
No. XRF screens elemental content but may not identify specific chromium or brominated chemical forms. It also does not directly quantify the four restricted phthalates.
What Is The Difference Between RoHS And REACH?
RoHS restricts specific substances in electrical and electronic equipment. REACH applies more broadly to chemicals and articles within the EU supply chain.
Does RoHS Compliance Require CE Marking?
Covered finished EEE placed on the EU market may require CE marking and an EU Declaration of Conformity under RoHS.
A component PCBA does not automatically carry a separate CE mark.
Can RoHS Exemptions Expire?
Yes. Exemptions can change, expire, or apply differently across product categories.
Does A RoHS Certificate Cover UK RoHS?
Not automatically. The declaration should identify whether it covers EU RoHS, UK RoHS, or both.
Are RoHS And Halogen-Free The Same?
No. RoHS restricts PBB and PBDE but does not make a product automatically halogen-free.
Halogen-free requirements usually use separate material limits and customer specifications.
Does RoHS Apply To Prototypes?
Legal obligations may depend on how the product is supplied and placed on the market.
Customers may still require prototype materials to match the intended production compliance specification.
Order RoHS Compliant PCB Assembly From Haode PCBA
RoHS compliant PCB assembly requires controlled materials, reliable supplier documents, lead-free production, traceability, risk-based testing, and formal change management.
Lead-free solder alone is insufficient. The assessment should also cover bare PCB materials, component packages, connectors, cables, coatings, adhesives, labels, and rework materials.
For EU and UK markets, buyers should define the applicable regulatory framework, product category, exemptions, REACH requirements, documentation, and market destination before production.
Haode PCBA provides complete PCB assembly services for customers in the United States, Canada, Europe, the United Kingdom, and Australia. Services include PCB fabrication, component sourcing, lead-free SMT assembly, through-hole assembly, inspection, testing, material traceability, and compliance-document support.
Send us your Gerber files, BOM, pick-and-place data, target market, RoHS requirements, REACH requirements, approved exemptions, and required report format for an engineering review and quotation.
