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I require a solid state relay to be able to switch high side, but also has low on-resistance.

G3VM has low on-resistance but it's application diagram shows exclusively low-side switch.

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Question:

  1. what is this configuration of FETs called ?
  2. Since it's isolated, why it cannot be used as high side switches ?
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    \$\begingroup\$ Nothing that says they cant be used for high side other than your interpretation. They are simply back to back mosfets. \$\endgroup\$
    – Kartman
    Commented Dec 1, 2021 at 0:27
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    \$\begingroup\$ connection A shows a high side switch 50% of the time \$\endgroup\$
    – jsotola
    Commented Dec 1, 2021 at 0:29

1 Answer 1

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Connection C is the high side switch to the load, if DC negative terminal = pins 6,7 as shown. Gnd is where you decide is 0V.

The Nch FETs are just ganged in parallel in "C" as a common-source mode switch (common to input and output) and switched drain.

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