PTC stands for "Positive Temperature Coefficient". PTC thermistors are resistors with a positive temperature coefficient, which means that the resistance increases with increasing temperature. PTC thermistors have a non-linear resistance/temperature response, and at a specified temperature the resistance changes rapidly to a very high value.
PTC thermistors act as thermal protection for electrical machines, and are well known particularly as motor-protectors.
We are manufacturing PTC Thermistors as per international standards DIN 44081, 44082 and BS EN 60034-11:2004. They are available with or without insulating sleeve and have flexible connecting leads. Many electrical motor & generator manufacturers are using Our PTC sensors.