One advantage of solid-state relay ... to pin 1 of opto-isolator (IC1) through a suitable current limiting resistor. Pin 2 of IC1 is grounded. Pin 6 of IC1 is connected to one main terinal of Triac ...

The solid-state relay’s low leakage current allows the device to be used in sensitive low level applications without affecting the signal, while its compact SOP-4 package saves space over ...