Switch type: normally closed normally open. NO: Electricity up to temperature NC: Stop over temperature Working voltage: 250V Overload current: 10A Action temperature: 0 degrees to 300 degrees (c) Foot width: 6.3mm Product certification: CQC certification, American UL certification, German VDE certification, EC CE certification. As a mechanical switch, according to industry regulations, every 5 centigrade is a first gear. KSD301 series product is a temperature control switch which uses bimetal sheet as temperature sensing component. When the electrical appliance works normally, the bimetal sheet is in free state and the contact is in closed/open state. When the temperature reaches the action temperature, the bimetal sheet is heated to produce internal stress and acts quickly. Open/close the contact and cut/close the circuit. So as to control the temperature. When the electrical appliances are cooled to the reset temperature, the contacts are closed / opened automatically and return to normal working condition. Widely used in: water dispenser, water heater, sandwich toaster, dishwasher, dryer, disinfection cabinet, microwave oven, electric coffee pot, electric cooker, refrigerator, air conditioning, glue machine, office equipment, car seat heater and other electric heating appliances. NO(Normal Open) NC(Normal Close) Note: Normal opening = over-temperature connection, Normal closing = over-temperature disconnection