KI-66/67 series of thermal protector are widely used in electric motors for industrial, household appliance and other electric equipment. The KI-66/67 series can effectively and reliably guard against that damage cause by overflow and overheat. The shell is made from heat resistant and heat conductive PBT engineering plastic. The product is applicable on externally installed plastic sealed motors and household electric appliance. The shell of enhance type is applicable on internally install plastic sealed motors and capable of tolerating the 3.5Mpa technical pressure for plastic molding.

KI-66/67 thermal protector is compose by neat conductive metal shell, bimetal component welded sliver alloy through current conductive frame, insulated fixing seat, static contact pad, heat resistant wire, etc. When the current goes through the bimetal component with impedance, if the current increase or environment temperature rises and the temperature reaches the reset value, the bimetal component will work and release the contact to shut off the current, and by contrast, if the device cool down to safe temperature, the contact point will reset automatically.