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  1. 06-12-2015, 07:24 AM #1
    Roxy
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    Quote Originally Posted by Mjolinor View Post
    AC SSRs probably use thyristors for switching, DC SSRs will use MOSFETS.
    I think what this means is: The Solid State Relay will turn on... But it won't ever turn off because it needs the current to reverse to turn off the Silicon Controlled Rectifier. Right?
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  2. 06-12-2015, 09:04 AM #2
    Mjolinor
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    Quote Originally Posted by Roxy View Post
    I think what this means is: The Solid State Relay will turn on... But it won't ever turn off because it needs the current to reverse to turn off the Silicon Controlled Rectifier. Right?
    The thyristor needs the current to drop to zero before it will open circuit once it is short.
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  3. 06-12-2015, 09:27 AM #3
    Roxy
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    Quote Originally Posted by Mjolinor View Post
    The thyristor needs the current to drop to zero before it will open circuit once it is short.
    Right! That is what I thought. But I used the wrong term. I said 'Silicon Controlled Rectifier'. A Thyristor is two of those in parallel but pointed in opposite directions.
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