Current Sensor Relay, Contact Form LED, Core Type Solid, Current Rating 20 A, Input Voltage 12 to 24V AC/DC, 24 to 230V AC/DC, Monitored Parameters Overcurrent, Undercurrent, Mounting Style Surface, Trip Point 1 to 20 A, Trip Point Type Adjustable, Electrical Connection Wire Leads, Sensing Hole Diameter 0.34 in, Status Indicator LED Indicator, Dielectric Strength 1,800V, Electrical Operating Durability 100,000, For Use With Sensors, Frequency 50/60 Hz