... noiseless, long life, compact, no spark, orrosion resistant and etc. Single phase AC solid state relay (AC-AC)DescriptionZYG-type solid ... a small input control current, can be well compatible with TTL, HTL, CMOS integrated circuits and etc; While the output loop adopts ... andoff the load current. There is photocoupler to isolate the input and output, no movable contact parts. It comes with the features ...