Get the hard facts to successful 62368 compliance – from your UL experts
The IEC 62368-1 Knowledge Hub covers an exceptionally wide range of topics, which we believe can be helpful to manufacturers and distributors of A/V & ICT equipment.
This Q&A includes many of the questions we have been asked, with answers from UL experts. Registered users may also submit additional questions related to the 62368: UL has the answer.
Q&A: You ask, we answer
We have power supplies & PDU (EN 60950-1 certified) which are shipped as spares with our system or our customer can buy later – since after Dec. 20, 2020 EN 60950-1 will be withdrawn, how will we be able to ship these power supplies/PDUs to Europe?
When a 60950-1 certified internal power supply is used in an end product, is it required that internal components of power supply – capacitors, GDTs, etc. - meet 62368-1 clause 5.5.2.1 / 5.5.7’s electric strength requirement?
I noticed that EN 60950-1 is no longer shown under the LV Directive standards (column 2) in the Official Journal (OJ) of the EU. I thought it was going to be withdrawn next year?
A PSU certified to 60950-1 passes HIPOT test at 2121 V DC between PRI and earth. When it is used in an end product to be certified to 62368-1, does it need to withstand the end product HIPOT test that could be more than 2121 VDC, e.g., 2500 V DC?
Have any other countries / regions been identified other than the EU that will not accept legacy end products certified to 60950-1 (or 60065) after December 20, 2020?
As for the IEC62368-3:2017, the test methods for specified ports (USB or PoE) under different conditions are not clear. Will these parts be clarified?
How to understand the highest and lowest specified charging temperature in Annex M.4.2? Can we regard the "charging operation temperature" in the battery specification like 0 -45 degree C as these two temperatures?
Could you explain more details about Annex K.7.1? Especially for the first 4 paragraph? In actual practice, the interlock switch used in mains circuits hardly have 3mm contact gap. what should i do for this case?
Related to hiccup mode, how are power sources classified per 5.2.2 for a 3.6 V output?
Which are the temperature limits during the abnormal operating conditions?
Why did UL 62368 not use UL 101 method ("e" is always open) to measure touch current? what's the background?
We have a heatsink on our product made from EPP. The temperature of this heatsink will reach 100°C max but won't need to be touched to use the product. Unfortunately it's impossible to stick something on the EPP to warn the user. What can we do?
What kind of ES class can we define for the secondary circuits(SELV) of one AC PSU certified according to 60950-1 previously now need to comply with 62368-1:2014 Ed.2, the AC PSU can meet SELV requirement, but cannot meet ES1 requirement.
Ref. 6.4.8.2.2: Do components that fill an opening in a fire enclosure have to be V-1 , regardless of their proximity to a PIS?
For a remote control with a user replaceable coin battery, s-cl 4.8.2 requires an instructional safeguard. Can text (element 2) be replaced with a symbol (e.g., element 1b of Annex F.5)? Alternatively, does a suitable symbol exist for element 1a?