In summary, Vishay‘s VOR1142x is a 400 V single channel, normally open, optically isolated solid-state relay (SPST - normally open) based on hybrid architecture which allows fast switching times with a wide operating ambient temperature range. A highly efficient AlGaAs IRED enables low forward current on the input side. On the output side, high performance MOSFET switches provide a low R_ON and can switch both DC and AC signals.