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Identifying RD5.1ESB2 if good or bad

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Discussion in 'Troubleshooting and Repair' started by Comnics, Aug 14, 2012.

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  1. Aug 14, 2012 #1
    Comnics

    Comnics

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    Feb 12, 2012
    hello everyone help me to identify this zener diode RD5.1ESB2, i use 1k range of ohmmeter to test the diode i put the positive probe to the cathode then the negative on the anode they have reading in low resistance. when i reverse they reading also at 100k ohms, this good or bad.. HELP.........
     
  2. Aug 14, 2012 #2
    CocaCola

    CocaCola

    3,635
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    Apr 7, 2012
    Google "Testing Zener Diode" there are plenty of step by step instructions...
     
  3. Aug 14, 2012 #3
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,482
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    Jan 21, 2010
    In addition to that, googling 1ESB2 will get you a heap of links that will tell you what to expect (hint 5.1V)

    Get a 9V battery and a 470 ohm resistor. Put all three in series (them and the zener) and measure the voltage across the zener. Reverse the zener and measure it again.

    One way should be around 0.6V, the other around 5V
     
  4. Aug 14, 2012 #4
    Comnics

    Comnics

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    Feb 12, 2012
    thank you Steve and Cola.
     
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