Self-powered, no external power supply is required. The action current is 0.2-30A AC, which can be adjusted by a potentiometer. LED indicator can conveniently and intuitively indicate the working status of the switch. And it is a high-power MOS tube contactless electronic switch. This switch has no limit on the number of opening and closing, and the reaction speed reaches the ms level. Straight-through structure design, the isolation withstand voltage is up to 2000V. Hysteresis is less than 1% and can be used under strong magnetic conditions.SZC23 series AC current induction switch is designed and manufactured to solve AC current monitoring. It uses the principle of mutual inductance to detect AC through current, isolate AC current, and output normally open or normally closed switch signals to directly control various automated industrial equipment, such as flashlights, buzzers, relays, microcontrollers or other power load devices. Compared with traditional transformers, thermal protectors and other devices, using this device not only can be more accurate and timely control, but also can greatly simplify the design and reduce the cost.Made of high quality ABS material, this switch is sturdy and durable.Length of the current sensing switch is 6.5cm, width is 2.5cm, height is 4.7cm.It is suitable for AC current measurement and monitoring, AC motor overload protection, electronic switch of automatic control system, etc.Item Name: Current Sensing SwitchMaterial: PlasticModel: SZC23-NO-AL-CHPower Supply: Not RequiredRated Load: 0.5A@240V AC / DCInput Current: 0.2-30A ACMinimum Connection: 0.50.2AMaximum Overload: 100%Leakage Current: 0.1AAccuracy: 1%Hysteresis: 1%Response Time: 200msRepeatability: 100%Working Temperature: -20 - 60 Celsius Waterproof Rating: IP30Features: Adjustable, Self-powered, DurableSize Details: Aperture Diameter: 10mm/0.4" (Approx.)Size: 6.5cm x 2.5cm x 4.7cm/2.56" x 0.98" x 1.85" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Current Sensing Switch