Polymer PTC Thermistors

The PPTCs are known by the trade names PolySwitch or Multifuse. PPTC stands for the English term Polymer Positive Temperature Coefficient. For multiple, demanding circuit overcurrent protection, PPTCs are the perfect solution. If the maximum permissible current is exceeded, the PPTC heats up and becomes very high-impedance in a very short time, which means that the current is throttled far below the normal current. In contrast to conventional current fuses, the polymer PTC returns to its original state after it has cooled down. Due to their properties, polymer PTCs are a low-cost solution for short-circuit protection and overload protection applications.