Ametherm 

It is a leading global manufacturer of thermistors. Ametherm's products have the highest steady state rated current on the market and the strongest energy carrying capacity. With excellent long-term stability and rugged construction, these products are ideal for limiting inrush currents in a wide range of applications, including motors (1/3 to 3.0 hp), medical (power), Security systems (X-ray machines), transformers (up to 8.0 KVA), telecommunications (outputs up to 4000 W) and motor drives.