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The Meaning Of The Symbols In Power Adapter

By Jestine Yong on June 18, 2013

If you look at the back cover of power adapter or some electronics equipment you could see some symbols. Those symbols has meaning and the meaning can be seen below. There are more than 6 symbols in the market and the below symbols are just some of them. You may click on the photo to read more about power supplies and some other important electronics articles.

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6 Comments

Mohammed Kasima

June 19, 2013 at 6:20 pm

highly informative article. I was looking for it for the past few days. Thank you so much

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- Jestine Yong
  
  June 19, 2013 at 11:36 pm
  
  HI Mohammed,
  
  You are welcome.
  
  Jestine
  
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Samuel Norman

October 9, 2013 at 9:47 pm

Thanks for this article. I am searching for the meaning of some other symbols present on power supplies.
And I already found information on many symbols on the web, for example:

http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=guide_safetymarks
http://www.swecheck.com.au/pages/learn_product_approvals.php
http://www.atbatt.com/laptop-chargers.asp
http://www.apartmenttherapy.com/deciphering-the-power-label-on-your-ac-adapters-168405
http://www.energystar.gov/ia/partners/prod_development/revisions/downloads/International_Efficiency_Marking_Protocol.pdf

However I cannot find the meaning of the symbol "10" surrounded by 2 arrows, like on the right side of picture here:
http://www.atbatt.com/blogimages/laptop-adapter-safety-mark-l.jpg

Do you know the meaning of this "10" symbol ?

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- Jestine Yong
  
  October 10, 2013 at 10:36 am
  
  HI Samuel,
  
  Thanks for all the links. As for the "10" symbol meaning, sorry no info on this.
  
  Jestine
  
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- zen zen
  
  October 29, 2024 at 5:54 pm
  
  The number in the circle is an indication for the "Environment Friendly Use Period", the period in which it's safe the contained substances will not leak out. 10 in your circle means that it's pretty safe that for 10 years, no RoHS-critical substances will leak out.
  
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Olaf

September 12, 2019 at 9:58 pm

Could not find a source for the house Symbol for indoor use.
Which Standard does include it?
I had a look into EN 62368-1 and couple of other Standards and regulations.
Could not find any source showing this logo.
Is it voluntary or is it a mandatory by and Standard or Regulation?
Does anyone know?

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