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Do protective diodes on FET's make FET's one dirctional switches

Discussion in 'Datasheets, Manuals and Component Identification' started by needToknow, Sep 19, 2012.

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  1. needToknow


    Sep 14, 2011
    One direction is already open due to the diode. So to make a two directional switch, one needs two FET's.

    Is this correct? Thank you.
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    Correct, yes. Connected in series (not in parallel as in analog switches).
    Have a look at AC photomos relays, they have exactly that kind of internal circuit.
    Last edited: Sep 20, 2012
  3. needToknow


    Sep 14, 2011
    I see. Thank you very much.
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