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PTC and PT100
source：未知 time：2024-08-08 15:20nbsp; click：
PTC and PT100 are commonly used thermistors in motor windings. Both are thermal resistors, and their resistance values will change with temperature. However, their functions and uses are different.
About PTC
PTC is the abbreviation of Positive Temperature Coefficient, which is a type of thermistor. It refers to a type of thermistor whose resistance value will increase with the increase of temperature. This type of thermistor is widely used in protection circuits.
When a PTC thermistor is installed in the protection circuit, once the surrounding temperature rises to a certain critical temperature point, the positive temperature coefficient of the thermistor resistance value will increase sharply, so that the resistance value tends to infinity. This characteristic is used to start the protection circuit through a switch signal of the control circuit, thereby realizing the protection of a specific object. When the temperature drops, the PTC will automatically return to normal, automatically release the protection or alarm state, and the system will operate normally again according to the predetermined requirements.
When a PTC thermistor is installed in the protection circuit, once the surrounding temperature rises to a certain critical temperature point, the positive temperature coefficient of the thermistor resistance value will increase sharply, so that the resistance value tends to infinity. This characteristic is used to start the protection circuit through a switch signal of the control circuit, thereby realizing the protection of a specific object. When the temperature drops, the PTC will automatically return to normal, automatically release the protection or alarm state, and the system will operate normally again according to the predetermined requirements.
About PT100
Although PT100 is also a thermistor, its positive temperature coefficient is very stable. In order to understand PT100 in a deeper level, we must first understand the meaning of the name PT100. PT is the symbol of metal platinum, and 100 means that the resistance value of PT100 at 0 degrees is 100 ohms.
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