Simple plastic rotary onoff switch designed for reliable everyday use. Easy to operate and install in panels. 3pole configuration supports threeline circuits, offering versatile power control in one compact unit. Builtin circuit protection suitable for main control of ventilation equipment, air conditioners, and water pump systems; capable of directly switching smallcapacity motors. Fingersafe design protects users during handling and reduces risk of electric shocks. Durable plastic housing provides light weight and corrosion resistance; compatible with standard enclosures and mounting footprints. Practical use scenarios: Use as the main switch for a workshop ventilation fan or exhaust system. Control the compressor in a home air conditioner or the water pump in a circulation system. Directly drive small motors in printers, conveyors, or small workshop machines.