YMD11 series load switch with reliable function and small size can be applicable to ventilatory air-conditioner and water pump system. It is widely used in industry equipment as main switch and as distributed switch for insulation and safe isolation. Characteristic 1. Contact operation mechanism ensures contact-off/on and switch and handle in a same line. 2. Insulation distance of breaking up to 13~14mm. 3. Finger-protection function against electric shock for touching conductor unconsciously. 4. Internal screws against slipping of manual operation ensure the best effect of air staring or electric starting and safe installation. 5. Various installation methods: plane and base mounting type. Base type installation can use screw or guide-gap mounting.