... 20mA/external potentiometer KH series SCR( thysitor ) phrase trigger module is suitable for continuing adjusting voltage for kinds of ... %Power consumption:less than 3WPhrase range: les than 180°Trigger capacity: less than 800A silicon controlled2. Order Code KH ... -- Order codeB1: Single phrase trigger moduleB3: Three phrase trigger module, three –phase three-wire diagramB4; Three ...