Stable performance: Designed for precision and reliability, this current sensing switch simplifies wiring and delivers accurate monitoring, outperforming traditional transformers and thermal protectors. Integrated power supply: Selfcontained power supply operates without an external source and remains functional in strong magnetic environments, enabling hassle installation. LED indicator light: Builtin LED shows status at a glance and supports monitoring of input current in the 2 to 30 A AC range for quick verification. Robust construction: Tube technology and selfextinguishing ABS housing provide strong resistance to heat, acids and alkalis, delivering durability and safety in demanding use. Function and compatibility: Reliable current sensing for AC circuits in the 2–30 A range, suitable for standard electrical environments and easy integration into control panels and existing systems. Materials and performance: ABS housing with tube technology for heat resistance and long service life; designed for stable, continuous operation. Use scenarios: 1) Industrial automation: protect motors and conveyors by switching based on current thresholds to prevent overload and damage. 2) Power supplies and charging systems: monitor and protect lab benches, chargers, and UPS setups with builtin current sensing. 3) Home and DIY projects: safe, reliable AC current monitoring for experiments, smart home integrations, and prototype testing.