Current Switches Back To Top Model Description AS1 Series 1-150A; AC Sensing; N.O. & N.C. ASM Series 1.5 to 0-150A; AC Sensing; Self-calibrating AS3 Series 1-6 to 40-175A; AC Sensing; 3 selectable ranges ASX Series 2-12 to 50-200; High Performance AC Sensing; 3 selectable ranges ASO Series P3-350 mA; AC/DC Sensing; N.O. & N.C. DS3 Series 4-20 to 15-100A; DC Sensing; Hall effect technology