3
\$\begingroup\$

I'd like to use an old laptop AC adapter in conjunction with an adjustable buck module as a project power supply.

It works, but I'm ignorant of some safety details; for example I'm uncertain whether my adapter, which uses a non-earthed input, is "isolated from the mains".

I've tried researching the symbols on the label, but one symbol which feels relevant I cannot identify:

What is that letter T in a triangle?

Does it mean "safe"?

Or "death"...?

\$\endgroup\$
5
  • 6
    \$\begingroup\$ People use that for charging laptops and have survived. Thus it must be isolated. I do love the exclamation mark, as if it says "Warning: Made in China". \$\endgroup\$
    – Justme
    Jul 16, 2020 at 22:37
  • 1
    \$\begingroup\$ I've scoured the internet trying to figure out this symbol, including reverse image searches. The best theory I have is that it's something proprietary to Astec (now Artesyn, a subsidiary of Emerson). I don't believe it is a symbol related to compliance or safety. \$\endgroup\$
    – JYelton
    Jul 16, 2020 at 23:06
  • \$\begingroup\$ You're joking right? What would you expect from a Dell approved source? and you aren't concerned about the Made In China Symbol /!\ \$\endgroup\$ Jul 16, 2020 at 23:30
  • \$\begingroup\$ it could be a stylized battery symbol \$\endgroup\$
    – jsotola
    Jul 17, 2020 at 0:01
  • \$\begingroup\$ @Justme Thanks for the reassurance. \$\endgroup\$
    – Boann
    Jul 17, 2020 at 10:45

1 Answer 1

9
\$\begingroup\$

Older symbol for Japan's Product Safety Electrical Appliance & Material. Replace by the second symbol.

enter image description here

From Product Approval Markings

\$\endgroup\$
2
  • 1
    \$\begingroup\$ WTG ssrat...... \$\endgroup\$ Jul 17, 2020 at 9:51
  • \$\begingroup\$ So the symbol is not as specifically relevant as I thought. But nice find, thank you. \$\endgroup\$
    – Boann
    Jul 17, 2020 at 10:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.