IEC 62368-1: the standard that replaced 60950
The most useful thing a buyer can do with this standard is notice when a supplier is quoting the one it replaced.
Published · 7 min read · By YCP Team
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Why a report against the old standard tells you something
The older standards were withdrawn after a transition, and 62368-1 covers the ground both of them used to. That means a live product being sold today should be supported by testing against the current standard as applicable in the market you are selling into.
So when a supplier sends a report against the superseded IT-equipment standard, treat it as a date stamp. The design may have been tested years ago, the report may predate several component changes, and nobody has revisited it. The document is not fraudulent — it is stale, and staleness is the commonest defect in supplier compliance files.
The same reasoning applies in reverse. A supplier who has current testing has usually had to re-engage with a laboratory recently, which means somebody has looked at the design since it was designed. That is worth something on its own.
This page publishes no transition dates and no edition numbers, deliberately. Editions and their adoption differ by market and by regulatory reference, so the specific answer belongs to the market you are selling into and the edition referenced there — and a date copied into a guide is exactly the sort of thing that becomes wrong quietly.
And check the market, not the standard alone. What matters is what the destination's legislation references, which may lag or lead the international standard, and which is the question to ask your destination-side adviser rather than the factory.
Hazard-based, and why that changes the conversation
The model in one sentence: identify the energy sources in the product, classify them by the harm they could cause, and place safeguards between each source and whoever could be harmed — with the strength of the safeguard matched to the class of the source.
The energy sources are not only electrical. Thermal — a surface that can burn. Mechanical — an edge, a moving part, a battery that can rupture. Chemical — an electrolyte. Radiation — a laser or a bright source. A product that is electrically safe can still fail this analysis on any of the others.
Safeguards come in layers, and the standard is explicit that a single safeguard between a person and a hazardous source is usually not enough for the higher classes. That is the reasoning behind double insulation, behind enclosures that require a tool to open, and behind the interlocks and cut-outs a good design has.
Which gives you a question worth asking a factory: what are the energy sources in this product, how are they classified, and what safeguards separate each from the user? A factory doing its own safety engineering answers that in a paragraph. An assembler quoting somebody else's design produces a certificate number, and that difference is more informative than any specification sheet.
It also explains why battery products get so much attention in this standard: a cell is simultaneously an electrical, thermal and chemical energy source, and the safeguards have to address all three.
What to ask for, and what a report should show
The report against the current standard, for your model, from a laboratory whose accreditation covers this kind of testing. Check the model, the applicant and the date, as with any test report.
The construction the report is based on. Safety testing is tied to a specific construction — the transformer, the insulation system, the creepage and clearance distances, the enclosure material and its flame rating. If any of those change, the report may no longer describe the product.
The critical components list. Safety reports typically identify components on which the result depends, along with their ratings and approvals. That list is the single most useful page in the report, because it is exactly what a cost-down attacks — and a substituted component from that list invalidates the basis of the report while every document remains internally consistent.
The conditions and any national differences. Standards are adopted with national deviations in some markets, so a report should be clear about which version and which deviations it was run against.
And remember what a report is not. It says a sample met the standard on a date. Production consistency is a separate obligation, and the marking, the declaration and the technical file are separate documents again.
The clause that protects you
Name the critical components in your specification — the transformer, the optocoupler, the input capacitor, the fusing arrangement, the insulation materials, the enclosure material and its flame rating — and require written notification before any of them changes.
That clause is the whole defence, because the realistic failure is not a factory that never tested. It is a factory that tested, passed, and then changed a component in a cost-down two years later without anybody re-running the analysis. Every document still matches every other document, and none of them describes the goods.
Ask for the report to be refreshed when the design changes materially, and treat that as a cost of the change rather than an argument about who pays.
And keep the report where you can find it. A market surveillance enquiry, a marketplace request or a customer's compliance team all arrive with a deadline measured in days.
The short version: a current report, a critical components list, and a change-notification clause. Three things, all obtainable at quotation, and together they are most of what a buyer can realistically do about product safety from another country.
Questions people actually ask
What did IEC 62368-1 replace?
The two separate older safety standards — one for information technology equipment and one for audio and video equipment — which were withdrawn. It now covers the ground both of them used to, which is why a report quoting the superseded IT-equipment standard is a dating device rather than a wrong document.
What does "hazard-based" actually mean?
Instead of listing permitted constructions, the standard identifies the energy sources in a product — electrical, thermal, chemical, mechanical, radiation — classifies them by the harm they could cause, and requires safeguards between each source and whoever could be harmed, with the safeguard matched to the class of the source.
What should I ask a factory about this standard?
What the energy sources in the product are, how they are classified, and what safeguards separate each from the user. A factory doing its own safety engineering answers in a paragraph; an assembler quoting somebody else's design produces a certificate number — and that difference tells you more than any specification sheet.
Why does a supplier send an old-standard report?
Usually because that is what exists. The design was tested years ago, the report predates several component changes, and nobody has revisited it. It is not fraudulent — it is stale, and staleness is the commonest defect in a supplier compliance file. Treat it as a question about the design, not just about the paperwork.
What is the most useful page in a safety report?
The critical components list. It identifies the components the result depends on, with their ratings and approvals — which is exactly what a cost-down attacks. A substituted component from that list invalidates the basis of the report while every document remains internally consistent with every other.
How do I stop a component change invalidating my report?
Name the critical components in the specification — transformer, optocoupler, input capacitor, fusing, insulation materials, enclosure material and flame rating — and require written notification before any of them changes. That single clause is most of the defence available to a buyer in another country.