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  2. Surge protector - Wikipedia

    en.wikipedia.org/wiki/Surge_protector

    Surge Protection Device (SPD) for installation in a low-voltage distribution board. A surge protector (or spike suppressor, surge suppressor, surge diverter, [1] surge protection device (SPD) or transient voltage surge suppressor (TVSS) is an appliance or device intended to protect electrical devices in alternating current (AC) circuits from voltage spikes with very short duration measured in ...

  3. IEC 61000-4-5 - Wikipedia

    en.wikipedia.org/wiki/IEC_61000-4-5

    IEC 61000-4-5 defines test set-up, procedures, and classification levels. In particular, it standardizes the required surge voltage and current waveforms for laboratory testing, with the "1.2/50-8/20 μs" impulse being the most frequently used surge waveform. Although this standard is designed for testing equipment as a whole at system level ...

  4. 'Plug in tons of items in one spot' — our tech writer's ...

    www.aol.com/lifestyle/plug-in-tons-of-items-in...

    If you don't think you need the USB-C port, the brand also makes a surge protector without it (and while a little pricier, that one has over 50,000 five-star reviews). Now, about that night light.

  5. Inrush current limiter - Wikipedia

    en.wikipedia.org/wiki/Inrush_current_limiter

    An inrush current limiter is a component used to limit inrush current to avoid gradual damage to components and avoid blowing fuses or tripping circuit breakers. Negative temperature coefficient (NTC) thermistors and fixed resistors are often used to limit inrush current. NTC thermistors can be used as inrush-current limiting devices in power ...

  6. Insulated-gate bipolar transistor - Wikipedia

    en.wikipedia.org/wiki/Insulated-gate_bipolar...

    Invented. 1959. Electronic symbol. IGBT schematic symbol. An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily forming an electronic switch. It was developed to combine high efficiency with fast switching. It consists of four alternating layers (NPNP) [1][2][3][4][5] that are controlled by a metal ...

  7. Varistor - Wikipedia

    en.wikipedia.org/wiki/Varistor

    Modern varistor schematic symbol, which is the same as a thermistor symbol [ 1 ] A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [ 2 ] It has a nonlinear, non- ohmic current–voltage characteristic that is similar to that of a diode.