This SPST-NO,double in-line printed circuit board mount SSR provides AC output switching in a high density package. The relay's DC input is compatible with 5VDC,12VDC and 24VDC logic systems. The relays include a LED indicator to provide input status information. Rated load curent is 2A,3A, rated load voltage is 220VAC,380VAC.  KS40A enables weak against strong electrical isolation and control, and level conversion. Can easily connect with computer and a variety of digital circuit interface.