SCK-057 Thermistor current starts flowing at loop. For a negative temperature coefficient, the devices provide prevention temperature compensation and temperature against high peak inrush current at turn-on, temperature compensation and temperature sensing,especially in power supplies where charging capacitors initially present extremely low impedance.Rush current suppressor can effectively limit surge currents for several seconds through an initial high resistance, therefore, critical components extend their life. The products are manufactured of a specially-formulated metal oxide ceramic. material and coated with silicon for insulation. NTC Thermistors are radial leaded discs or assembled into probes designed for durable performance. NTC Thermistors are non-linear resistors, which alter their resistance characteristics with temperature. The resistance of an NTC thermistor will decrease as the temperature increases. The manner in which the resistance of a thermistor decreases is related to a constant known in the thermistor industry as beta, or b. Beta is measured in °K.
A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiter, temperature sensors (Negative
Temperature Coefficient or NTC type typically), self-resetting overcurrent protectors, and self-regulating heating elements.
(Positive Temperature Coefficient or PTC type typically). Thermistors are of two opposite fundamental types:
With NTC, resistance Decreases with temperature to protect against inrush overvoltage conditions. Installedparallel in a circuit.
With PTC, resistance Increases with temperature to protect against overcurrent conditions. Installed seriesin a circuit.
Thermistors differ from resistance temperature detectors (RTDs) in that the material used in a thermistor is generally a ceramic
or polymer,while RTDs use pure metals. The temperature response is also different; RTDs are useful over larger temperature
ranges, while thermistors typically achieve a greater precision within a limited temperature range, typically −90°C to 130°C.