Glossary
Non linear resistors, Thermistors

Self-heating effects

Heating of NTC ceramics by Joule effect (in the high-voltage zone of the I = f (V) curve), leading to a reduction in resistance and an increase in current.

Polycrystalline ceramic

Dense material obtained from a powder shaped and sintered at a temperature below its melting point.

Temperature coefficient B or β (parameter equation: B or β) expressed in K

Calculated relationship between two temperatures :

B = T₁T₂/(T₂ – T₁) × log (R₁/R₂)

Switching temperature

For a PTC developed with a BaTiO₃-based material, a significant jump in resistivity is observed around the Curie transition

Curie point temperature

For a dielectric, this is the temperature of the ferroelectric-paraelectric (quadratic-cubic) transition.

Thermistor CTN (Coefficient...