Does Your Appliance Need an IEC 60335-1 Power Supply?
Whether your appliance needs an IEC 60335-1 power supply depends on the finished appliance’s safety requirements, its applicable Part 2 standard, and the way the supply is assessed within that product. A household use description alone does not settle the answer. Identify the appliance category first, then ask for supply evidence that matches the required editions and the exact configuration. The IEC’s IEC 60335-1 record describes the scope and the need to use the appropriate Part 2.
Identify the appliance before selecting its power supply
Write a short description of the appliance’s function, intended users, installation and target markets. Include whether the adapter is external, whether it is supplied with the appliance, and what the appliance does with its DC input. This gives the safety reviewer enough context to start selecting requirements.
IEC 60335-1 covers household and similar appliances, including some equipment used by laypersons in shops, light industry or farms. Its scope separates out categories such as medical and audiovisual or information-technology equipment. A device located in a home can therefore belong to a different product category. Readers comparing those latter categories can use the separate IEC 60601-1 versus IEC 62368-1 guide to frame that discussion.
Also describe the charging function accurately. A DC adapter connected to a device containing a battery does not establish that the adapter itself falls under the battery-charger standard. The scope of IEC 60335-2-29:2016 illustrates the distinction: it addresses specified household battery chargers and excludes supply units for electronic equipment. The reviewer needs to know which part of the system performs charging and how the product is classified.
At this stage, ask for a documented applicability decision. A supplier’s list of familiar standards can help locate evidence once the appliance requirements are known.
Check the Part 1 and Part 2 editions together
Part 1 supplies general requirements; the applicable Part 2 adds or modifies requirements for a particular appliance type. Treat them as a pair when reviewing a specification or report.
The IEC catalogue lists IEC 60335-1:2020+AMD1:2025 as edition 6.1. It also states that the sixth edition is to be used with Part 2 texts based on that edition. A newer Part 1 number on a quotation does not demonstrate that the complete standards combination is correct. IEC publication details establish that edition relationship, but they do not establish a target country’s adoption date or a project’s transition deadline.
The appliance at the top leads to two related reviews: the compatible appliance standards and the evidence for its power supply. Both feed the assessment of the assembled product.
Ask the laboratory or certification body to confirm the applicable Part 1, Part 2, amendments and national versions before comparing suppliers. Record that combination in the project requirement, along with any agreed transition basis.
You may also encounter IEC 61558 documentation. IEC 61558-2-16:2021 addresses switch-mode power-supply units and associated transformers for general applications and is used with its specified Part 1. Its presence in a supply’s documentation does not settle how that supply fits the appliance assessment. Ask the reviewer to explain what the offered evidence covers and what remains to be evaluated.
Read the safety evidence for the exact adapter
Move from the standard name to the proposed model. Compare the quotation, sample identification and safety documents before treating them as one evidence set.
| Evidence field | Question to resolve |
|---|---|
| Model and variants | Does the document cover the output rating, plug or inlet and construction being purchased? |
| Standard and edition | Does the report match the standards combination agreed for the project? |
| Input conditions | Are the proposed AC or DC input conditions within the recorded evaluation? |
| Installation conditions | What enclosure, ambient, mounting or other conditions does the assessment assume? |
| Report scope | Which tests or construction reviews were completed, and which items remain for the appliance? |
RECOM’s RAC03-K data sheet, revision 2/2020 lists IEC 62368-1, IEC 60335-1 and IEC 61558-related evidence separately. It also notes that safety-file submission covered AC-input operation. This older document illustrates how to read scope; it does not establish current approval for another product or manufacturer.
If a headline says “IEC 60335-1 approved,” request the supporting certificate or report and its conditions. If the supplier instead states that a product is designed to meet a standard, ask what evaluation has been completed. Preserve the supplier’s actual claim in the comparison; do not upgrade design intent into a completed approval.
Close the appliance assessment with the supplier and lab
The appliance team needs to connect the supply evidence to the intended installation. Send the reviewer the adapter documents together with the appliance configuration and relevant operating conditions. Ask which conclusions can be carried into the appliance assessment and which require further examination.
Make the unresolved questions specific. A report may cover the supply model while the proposed cable, enclosure placement or input condition still needs review. Record each difference, the person responsible for deciding it, and the evidence needed to close it. A purchase order should not silently convert an open integration question into an accepted configuration.
Use the broader adapter qualification plan to hold the approved model, configuration and remaining evaluation tasks. Keep the standards applicability decision and the supplier’s evidence linked to that same revision.
For the next supplier inquiry, send the appliance description, target markets, agreed standards pair and proposed adapter configuration together. Request the model-specific documents and a list of conditions or exclusions that the appliance reviewer must consider.