PTC (Heating Element belongs to the group of Passive Electronic Components (PEC). The PTC is made of Barium Titan-ate. PTC elements are programmable during production (do not require IC card 3rd element as MCH) of hair straighteners and hair curlers and by using it. PTC maximum ideal temperature with hair tools products is up to 230C. PTC heater is the most common element for home usage hair flat irons and curling irons. PTC requires around 1 minute to heat up to its maximum temperature.MCH Heating Element belongs to the group of Active Electronic Components (AEC), The MCH, is made of Ceramic. MCH elements are able to combine multi-function and stable temperature for long and intensive usage. MCH elements are more common with Professional Salon hair tools and high end products. MCH could arrive its maximum temperature within 20 seconds.