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  2. Thermal cutoff - Wikipedia

    en.wikipedia.org/wiki/Thermal_cutoff

    Two thermal switches (Thermal Cut) Schematic symbol for a thermal overload switch. A thermal switch (sometimes thermal reset or thermal cutout (TCO)) is a device which normally opens at a high temperature (often with a faint "plink" sound) and re-closes when the temperature drops. The thermal switch may be a bimetallic strip, often encased in a ...

  3. Insulation system - Wikipedia

    en.wikipedia.org/wiki/Insulation_system

    Basic insulation is any material added to protect a user from accidental contact with energized parts. Supplemental insulation is rated to withstand 1500 volts AC. Double insulation is a design concept where failure of one insulation system will not expose the user to a shock hazard due to the presence of a second independent layer of insulation.

  4. Overheating (electricity) - Wikipedia

    en.wikipedia.org/wiki/Overheating_(electricity)

    The circuit resistance never kept too low. Sometimes some parts placed inside the board and box, maintaining a proper distance from each other, to avoid heat damage and short-circuit damage. To prevent short circuit, appropriate types of electrical connectors and mechanical fasteners are used.

  5. 78xx - Wikipedia

    en.wikipedia.org/wiki/78xx

    7805 in TO-220 and TO-92 packages Internal die of a Tesla MA7805. 78xx (sometimes L78xx, LM78xx, MC78xx...) is a family of self-contained fixed linear voltage regulator integrated circuits.

  6. Sosna-U - Wikipedia

    en.wikipedia.org/wiki/Sosna-U

    Sosna-U sight. The Sosna-U (Russian: Сосна-У, "Pine-U") is a Belarusian/Russian tank gunner's sight used on tanks such as the T-72B3, T-80BVM and T-90MS. [1] [2] It was developed in Belarus by JSC Peleng and later produced in Russia by JSC VOMZ.

  7. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    Displays supporting refresh rates higher than 60 Hz (such as 90 Hz or 120 Hz) also began to appear on smartphones in 2017; initially confined to "gaming" smartphones such as the Razer Phone (2017) and Asus ROG Phone (2018), they later became more common on flagship phones such as the Pixel 4 (2019) and Samsung Galaxy S21 series (2021). Higher ...

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