Features: Self-powered, no external power supply required. Action current 0.2-30A AC, adjustable with a potentiometer. LED indicator can conveniently and intuitively indicate the working status of the switch. High-power MOS tube contactless electronic switch. The switch has no limited on the number of opening and closing, and the reaction speed reaches the ms level. Straight-through structure design, isolation withstand voltage up to 2000V. The outer casing is made of self-extinguishing material ABS. Suitable for AC current measurement and monitoring, AC motor overload for protection, electronic switch of automatic control system and so on. Package Includes: 1x Current Sensing Switch Specifications: Model: SZC23-NO-AL-CH Power Supply: Not required Rated Load: 0.5A 240V AC/for DC Input Current: 0.2-30A AC Switch on Minimum: 0.50.2A Maximum Overload: 100% Leakage Current: 0.1A Accuracy: 1% Hysteresis: 1% Response Time: 200ms Repeatability: 100% Working Temperature: -20~60 Waterproof: IP30 Dimensions: 65x25x47mm / 2.56x0.98x1.85in Hole Diameter: 10mm / 0.4in note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.