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What is this electrical symbol? T with overbar in down-pointing triangle

Electrical Engineering Asked by Boann on October 29, 2021

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"…?

One Answer

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

enter image description here

From Product Approval Markings

Answered by StainlessSteelRat on October 29, 2021

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