Series Resistor for DC SSR

Discussion in 'General Electronics Chat' started by mcgyvr, May 13, 2013.

  1. mcgyvr

    Thread Starter AAC Fanatic!

    Oct 15, 2009
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    Does one "typically" need a series resistor for a DC solid state relay to limit input current.
    Part number: AD-SSR6M12-DC-200D
    Datasheet: http://www.automationdirect.com/static/specs/ssclass6relays.pdf

    Specs list a max input current of 10mA but I'd expect some sort of "warning" besides that to ensure one is used..

    I'm using one but wasn't sure if its normally needed or not. And I'm too scared to try it without it as I don't like making the magic smoke. :(
     
  2. chuckey

    Well-Known Member

    Jun 4, 2007
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    On sheet 27-44, they quote operating voltages " 3-32". That is what they require. One can therefore work out that at 32 V, they consume 10mA and at a lower voltage, less (it will not be linear). The 10 mA is quoted to make sure that your source can actually supply 10 mA!!
    Frank
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    I would say no as the input voltage is from 3-32v DC, as long as your supply can give out 10mA at least.
     
  4. mcgyvr

    Thread Starter AAC Fanatic!

    Oct 15, 2009
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    Thanks guys.. I'll go try it without the resistor now..

    edit.. confirmed.. Works without a resistor too..
     
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