Self powered operation The SZC23 Series AC Current Sensing Switch operates without an external power source, providing convenient, power cost performance in automation tasks. Adjustable actuation current Built in potentiometer enables setting the actuation current from 0.2 to 30 A AC, allowing precise control to suit a wide range of loads and applications. Clear LED status indicator An LED indicator displays the operating status for quick visual feedback, aiding monitoring and enhancing safety. speed contactless switching Using a power MOS tube design, the switch operates without contact and delivers millisecond level response, improving the efficiency and reliability of automated processes. Use scenarios Packaging and automation lines: trigger downstream devices or machinery when the monitored load current reaches the preset threshold, enabling seamless start stop control without additional power wiring. CNC machines and automated cells: detect motor start or changes in load current and feed into control logic or safety interlocks with fast response. Power circuit protection: rapidly respond to abnormal current surges to help protect equipment from faults or damage.