Features Self-powered, no external power supply required. Action current 0.5-200A 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. Widely used in automation industry that requires current monitoring such as substations, variable frequency speed control devices, inverter devices, electrolytic electroplating, street lamp monitoring, etc. Features:1The switch has no limit on the number of opening and closing, and the reaction speed reaches the ms level.2 Straight-through structure design, isolation withstand voltage up to 2000V.3. Hysteresis is less than 1% and can be used under strong magnetic conditions.4 The outer casing is made of self-extinguishing material ABS.5. Widely used in automation industry that requires current monitoring such as substations, variable frequency speed control devices, inverter devices, electrolytic electroplating, street lamp monitoring, etc. Specification:Model: SZC03-NC-AL-CH Power supply: Not requiredRated load: 0.3A@135V AC/DCInput straight-through current: 0.5-200A ACSwitch on minimum: 0.5±0.2AMaximum overload of straight-through current: 200%Accuracy: 10%Power consumption: ≤1WLeakage current: ≤1mAHysteresis: ≤1%Response time: ≤200msWorking environment: -30~70℃, 0-95%RHDimensions: 62*90*25.5mm / 2.4*3.5*1.0inHole diameter: 20mm / 0.8inPackage weight: Approx. 84g/2.96oz Packagelist:1 * Current Sensing Switch  Package List