Microtherm miniature thermal fuses microtherm g4a01167c microtemp axial thermal cut off 167c opening temperature 142c closing temperature 1200v ac dielectric strength 250v ac voltage 10a current the g4 series microtemp tco is the industry standard for over temperature protection this series is applied to millions of appliances and personal care products each year providing reliable back up protection for temperature controlling thermostats and other over temperature conditions wide