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transistor help !!

Discussion in 'General Electronics Discussion' started by abukharmeh, Jul 15, 2013.

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  1. abukharmeh


    Jul 15, 2013
    hello am new here
    i need some help
    a have 4 type of transistor
    which one is suitable to use as (transistor as switch)
    to turn on motor from dc source (6volt 500ma) or 9 volt
    and what is the value of resistor i have to connect to transistor base !!!!

    sorry for my weak english
    thanks for your help
  2. Miguel Lopez

    Miguel Lopez

    Jan 25, 2012
    Hope this help. I guess none of them is suitable for your purposes.

    S9013 625mW 500mA (it's in the limit)
    S9014 425mW 100mA
    S9012 625mW 500mA (it's in the limit)
    C1815 400mW 150mA

    I guess you should look for a BD137 type for that application. Then those transistor will be suitable for a Darlington pair with the BD137. (Those which are NPN)

    Last edited: Jul 15, 2013
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