st-4 diac

Discussion in 'General Electronics Chat' started by REHTNAP, Feb 26, 2012.

  1. REHTNAP

    Thread Starter New Member

    Feb 24, 2012
    17
    4
    hi
    im trying to find an alternative to a st-4 diac. its odd as its trigger voltage is around 7 v as opposed to 30v of normall diac. they seem to have long since become obsolete does anyone know of an alternative.
     
  2. hwy101

    Active Member

    May 23, 2009
    91
    28
    Have you tried looking on Digi-Key?
     
    Last edited: Feb 26, 2012
  3. hwy101

    Active Member

    May 23, 2009
    91
    28
    I read the data sheet, I'm confused, thought he was looking for a 30v trigger.
    thanks for clearing that up Ron
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
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    I deleted the post that you were responding to, just before you posted. I'm confused, because the first time I clicked on your link, it came up with something like HT-35. Now when I click on it, it gives me a big table of parts, and there are some silicon bilateral switches near the bottom that are around 7-9V. These are 3-terminal devices, so they wouldn't work for replacement, or in an existing design.
     
  5. hwy101

    Active Member

    May 23, 2009
    91
    28
    That's weird, there were no bilateral switches on that page
    anyway, I just replaced the link with the homepage
     
  6. REHTNAP

    Thread Starter New Member

    Feb 24, 2012
    17
    4
    i was sebt this as a poss alternative
     
  7. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
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    Have you looked at SBS? The datasheet has application information.
     
    REHTNAP likes this.
  8. REHTNAP

    Thread Starter New Member

    Feb 24, 2012
    17
    4
    thanks
    its a new one to me will have to learn how to use it
     
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