electronic component?

i hav a component, written on it is SCK 057, It looks more like an MOV but pale green in colour, i saw it blown on the power board of a projector, wht component is it and whts its function on the board, i see RT101 on the board where this component is mounted, pls HELP ME

1 Answer

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  • JAS
    Lv 5
    1 decade ago
    Favorite Answer

    That electronic component is a radial lead, *SCK type, NTC (Negative Temperature Coefficient) thermistor, also referred to as an inrush current limiter, which is used to limit the amount of inrush current, i.e., the power surge that occurs whenever the power is first switched on in electronic devices, particularly devices that constitute or contain a highly reactive (i.e., capacitive/inductive) electrical load such as a switching power supply.  *(SCK = Surge Current Killer)

    When power is applied to an NTC thermistor the temperature of the thermistor gradually increases due to self-heating by the current flowing through it. This in turn causes the resistance of the thermistor to gradually decrease, which causes the current to continue gradually increasing until it reaches its rated steady-state value. Hence, an inrush current limiter mitigates potentially damaging surges during power-up. To help find a replacement please use the resources I’ve provided below.

    ######################## RESOURCES ########################

    Negative Temperature Coefficient Thermistors

    http://www.designinfo.com/cornerstone/ref/negtemp....

    [PDF] NTC Thermistors

    http://www.mne.psu.edu/sommer/me445/ntcnotes.pdf

    ############ ELECTRONICS COMPONENT DISTRIBUTORS ############

    Allied Electronics

    http://www.alliedelec.com/

    Arrow Electronics

    http://www.arrow.com/

    Arrow Electronics - North American Components (NAC)

    http://www.arrownac.com/

    Avnet

    http://www.avnet.com/

    Digi-Key Corporation

    http://www.digikey.com/

    Farnell

    http://www.farnell.com/

    Future Electronics

    http://www.futureelectronics.com/

    Mouser Electronics

    http://www.mouser.com/

    Newark

    http://www.newark.com/

     

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