This type of knife switch has the following features: 1. overload protection function: when the current exceeds a predetermined value, the fuse will automatically fuse and cut off the power supply to prevent the equipment from being overloaded and damaged. 2. short-circuit protection: if a short-circuit occurs in the circuit, the fuse will also fuse automatically to limit the current and prevent fire. 3. Controllability: The switch state can be easily switched by manual operation to control and regulate the circuit. 4. High Reliability: High-quality materials and manufacturing processes are used to ensure high reliability and durability of the product. 5. Multi-functionality: In addition to overload protection and short circuit protection, it can also be used to control AC or DC circuits.