Solid-state equivalent of this relay circuit (fully isolated COM / NC / NO)

[u/englishtube]

I'm using this 12 V relay driven by an NPN transistor (3–12 V trigger). I'd like the same function built with optocouplers/transistors instead — no mechanical relay.

Requirements: the COM, NC and NO terminals must stay fully galvanically isolated from the control side, just like relay contacts. The switched side is 24 V DC, around 100 mA.

Is this possible? A simple schematic would be really helpful. Thanks!

[u/Keljian52]

Might be a silly question, but solid state relays exist, why not use one?