SSR resistor

Discussion in 'General Electronics Chat' started by Dritech, Nov 7, 2015.

  1. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    756
    5
    Hi all,

    I am going to use an Omron G3NA-240B solid state relay to switch a 1100W 240VAC device.
    Is there a particular resistance value which I should use at the input therminal of the SSR?
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,576
    4,483
    What does the datasheet for the relay recommend?
     
  3. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    5,298
    799
    No, just input any voltage from 5 to 24V dc.
     
  4. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    756
    5
    Hi, I'm not sure about that. Is it the 15mA? so 5V/0.015 = 330ohms ?
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,141
    2,639
    The typical input impedance for those SSR's is around 2-3K.
    As per #3 you do not normally require any series resitor.
    What are you driving it with?
    Max.
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,141
    2,639
    The spec sheet shows 7-15ma.
    Max.
     
  7. bertus

    Administrator

    Apr 5, 2008
    15,960
    2,452
    Hello,

    What you need on the input is dependend on the ordernumber:

    G3NA_order_info.png

    There are DC and AC input versions in the list shown.

    Bertus
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,141
    2,639
    This is the input impedance page.
    Max.
     
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