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UKCA marking has formed part of Great Britain’s product compliance framework for several years. Yet the changes around CE recognition, transition dates and market access have left many engineering and sourcing teams unsure about the current position.
Many manufacturers prepared for UKCA marking to replace CE marking across a wide range of products from 1 January 2023. That deadline was postponed before it took effect.
CE marking can now continue to be used for many regulated products placed on the market in Great Britain. UKCA remains available as a separate conformity route.
For engineers, product managers and sourcing teams, this creates a simple question: what should you check before approving a power supply?
What UKCA marking means
UKCA stands for UK Conformity Assessed. It applies to certain products placed on the market in Great Britain, covering England, Scotland and Wales.
The mark became available on 1 January 2021. It indicates that the manufacturer has assessed the product against the applicable Great Britain requirements and completed the relevant conformity process.
For electrical and electronic equipment, this may include electrical safety, electromagnetic compatibility, restrictions on hazardous substances and radio equipment requirements.
Some external power supplies may need to meet separate energy-efficiency rules too. These should be checked alongside the conformity marking rather than treated as part of the mark itself.
The exact evidence required will depend on the product, its intended use and the standards that apply.
What changed after the planned 2023 deadline
Businesses had been preparing for UKCA marking to replace CE marking across a wide range of regulated goods from 1 January 2023.
That change did not go ahead.
The UK Government postponed that deadline in November 2022. It later confirmed that CE marking would continue to be recognised for many product categories placed on the Great Britain market.
This means many businesses can use either the CE or UKCA route, depending on the regulations that apply to the product. You can find more detail in the government guidance for products sold in Great Britain.
The position is not identical across every sector. Medical devices, construction products, marine equipment, rail products and other regulated goods may follow separate arrangements.
For this reason, always check the rules for the finished product rather than relying on a general assumption about the power supply alone.
Can you still use a CE-marked power supply?
For many electrical and electronic products, yes.
A CE-marked power supply may still support equipment intended for Great Britain, provided the product falls within regulations that recognise the CE route.
The exact model must meet the applicable requirements. The technical documents must remain valid, and the supply must suit the intended installation.
Your finished equipment must still meet its own compliance duties. A UKCA mark is not automatically required simply because the end product will be sold in England, Scotland or Wales.
CE marking remains the relevant route for many goods sold within the European Union and European Economic Area. UKCA marking alone does not provide access to those markets.
Some manufacturers choose components carrying both marks where products will be sold across Great Britain and the EU. Each mark still needs valid supporting evidence.
CE and UKCA are separate routes
CE and UKCA marking support similar product safety aims, but they sit within different legal systems. CE conformity may rely on EU harmonised standards. UKCA conformity may use British designated standards.
Many of these standards remain technically similar. Their legal status still differs between the two markets.
This matters when declarations, technical files and test evidence are prepared. The documents should identify the correct route, legislation and standards rather than treat CE and UKCA paperwork as interchangeable.
Northern Ireland follows separate arrangements. Products placed on that market normally require CE marking. CE and UKNI may apply where a UK conformity assessment body carries out mandatory third-party assessment.
External and internal power supplies
The conformity position can differ depending on the type of power supply.
External adaptors are often supplied as complete products. They have their own enclosure, mains input, output connection and product label.
These units may carry CE, UKCA or other regional markings. They may need to meet separate safety, EMC and energy-efficiency requirements.
This is particularly relevant for external models, which often reach the market as finished products.
Internal power supplies work differently. They become part of the customer’s finished equipment.
Some internal units may be placed on the market as complete electrical products. Others may be treated as components intended for integration into another system.
Their marking and documentation will depend on the exact model, the manufacturer’s classification and the regulations that apply.
The checks may therefore differ for internal units, where installation conditions form part of the final product assessment.
A marked PSU does not approve the finished product
A CE or UKCA mark on a power supply does not make the complete product compliant. The finished equipment may still need its own conformity assessment, technical file and declaration.
The PSU may behave differently once it is installed inside a larger system. Enclosure design, cable routing, earthing, ventilation, ambient temperature and nearby components can all affect final performance.
For example, a supply may pass EMC testing under the manufacturer’s test conditions. Its behaviour may change once it is installed inside your product with different cables, grounding arrangements and PCB layouts.
Protection class can affect the design too. Class I supplies rely on protective earthing, while Class II units use double or reinforced insulation. Class III products operate from a safety extra-low voltage source.
This can influence cable choice, enclosure design and testing, so it helps to confirm which class fits the application before the design reaches the approval stage.
Check the exact model and documents
Approvals can vary within the same product family. One model may carry CE and UKCA marking, while another version may include extra approvals for markets such as North America, Australia, Japan or China.
A change to the input plug, cable, output connector, voltage or enclosure can affect the approved part number.
Before approving a power supply, check the exact model against:
- The product label
- The latest datasheet
- The declaration of conformity
- Safety certificates
- EMC test information
- Certificate model schedules
- RoHS and REACH documents
- Energy-efficiency information, where relevant
- Installation instructions
Do not rely on a general series brochure or a logo shown on a category page. The supporting evidence should cover the exact version you plan to use.
The declaration must match the conformity route and target market. A UK Declaration of Conformity may be needed for the UKCA route. An EU Declaration of Conformity may be needed for the CE route. You do not automatically need both documents for every power supply.
Why early checks still matter
UKCA marking may no longer feel new, but it still needs to form part of the early specification process. Late compliance checks can uncover missing documents, unsuitable markings, EMC concerns or an incorrect protection class.
A late PSU change can then affect the enclosure, PCB layout, mounting points, cables, connectors and thermal design. It may lead to repeat testing and production delays. These issues become harder to solve once the design is fixed, which is why early specification can reduce redesign work and approval delays.
A practical refresher checklist
Before approving a power supply, confirm:
- Where the finished product will be sold
- Which regulations apply
- Whether the route accepts CE, UKCA or another mark
- How the manufacturer classifies the PSU
- The markings carried by the exact model
- Availability of the correct declaration
- Certificate coverage for the exact part number
- Suitability of the safety and EMC standards
- Any separate energy-efficiency requirements
- The conformity assessment duties for the finished equipment
These checks help engineering, quality and sourcing teams work from the same information.
Support with PSU compliance checks
CE and UKCA marking provide a useful starting point, but they do not replace a full technical review.
You still need to confirm that the exact power supply suits the application, target market and final product assessment.
Ideal Power helps engineering and sourcing teams review model-specific approvals, relevant standards and available documentation. We can compare suitable options and flag areas that need further review before the design moves into production.
Check the mark, review the evidence and confirm the full application before approving your PSU.
