1. Self-powered, no external supply required. 2. Action current 0.2-30A AC, adjustable with a potentiometer. 3. LED indicator can conveniently and intuitively indicate the working status of the switch. 4. High- MOS tube contactless electronic switch. 5. The switch has on the number of opening and closing, and the reaction speed reaches the level. Straight-through structure design, isolation withstand voltage up to 2000V. Hysteresis is less than 1% and can be used under strong magnetic conditions. The outer casing is made of self-extinguishing material ABS. Suitable for AC current measurement and monitoring, AC motor overload protection, electronic switch of automatic control system and so on. Model: SZC23-NO-AL- supply: Not required Rated load: less than equal 0.5A 240V AC/DC Input current: 0.2-30A AC Switch on minimum: 0.50.2A Maximum overload: 100% Leakage current: less than equal 0.1A Accuracy: 1% Hysteresis: less than equal 1% Response time: less than equal 200ms Repeatability: 100% Working temperature: -20-60Celsius Waterproof: IP30 Hole diameter: 10mm / 0.4in Colour:black Material:Metal + Plastic Size:65 x 25 x 47mm Package Contents: 1 x Current Sensing Switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.