What is correct triac symbol?

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  • harp
    Badcaps Veteran
    • Jun 2022
    • 596
    • Planet Earth
    #1

    What is correct triac symbol?

    I noticed that in schematics is used random triac simbol, where on gate side is T1 or T2. I know it pass current in both direction, so generaly it is not important, but ask for consistency to learn correct. Why is developed this two way of marking if symbol is standarized?
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