what is the construction ,operations and practical applications of scr?

please include figurs and graphs

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  • Anonymous
    1 decade ago
    Favorite Answer

    An SCR is a silicon controlled rectifier. It is a 4 layer device, whereas a bipolar (standard) transistor is 3 layers. Two of the 4 layers are connected together. It is normally open until triggered by a small current, then it latches on, only to be turned off by removing the source of power (the anode has to go near 0V). It is usually used in AC applications. It is a half wave device. A triac is a full wave device, and is basically two SCRS connected back to back.

    So, an SCR might be used to control a solenoid (AC) in a 120V application. They are used in motor controls, like a drill. I dont know if todays dimmers use SCRs or Triacs.

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  • Matt D
    Lv 6
    1 decade ago

    What is scr? Silicon controlled rectifier???? What?

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  • 1 decade ago

    pl. ellaborate "scr" to offer specific answer

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